A Series on Understanding Assurance
What is assurance? How do you know if you have salvation and are a member of God’s holy people? Jesus emphatically
provides this assurance, "Truly, truly, I say to you, he who hears my word, and believes Him who sent Me, has eternal
life, and does not come into judgment but has passed out of death into life"
(John 5:24). Jesus' apostle John also writes, "And the testimony
is this, that God has given us eternal life, and this life is in His Son. He who has the Son of God has the life; he
who does not have the Son of God does not have the life"
(1 John 5:11-12). Despite this, many Believers are insecure and
have doubts and uncertainty.
For new Believers, the basis of their insecurity may be rooted in their understanding of faith (see
the series on faith starting with What is the concept of "faith" in the Old Testament?).
It is not uncommon to wonder if it is really that simple: just have faith in Jesus Christ. It
seemingly defies logic, because people don’t forgive others easily much less sacrifice their only son for an enemy.
For those who have been Believers for awhile, their insecurity may be rooted in their achievement.
To be "Christ like" defines a standard (i.e. behavior or character) for self appraisal or comparison, and sometimes
it mistakenly becomes the basis of a saving faith.
This may produce such questions as: what does God expect from me? What good deeds must I do to be
saved? Did I do enough?
With this understanding, assurance is predicated on one’s belief in Jesus as a historical figure and trust in
His work of atonement (see
What does "It is finished" mean? A word study of John 19:30).
Since it is Jesus who provides the assurance, it is independent of how one emotionally feels.
Eternal security provides the basis for one’s confidence in salvation.
It is a genuine faith alone that saves, and a genuine faith alone that assures
(John 3:16-21). So there is no reliable outward sign or behavior
that indicates whether one has salvation or not (1 John 2:18-19);
it all comes down to whether you believe the gospel is in fact true and trust it.
In many ways a trusting faith comes down to how well one understands the facts and provisions of the gospel. The
question of assurance is a consequence of doubt, and faith, or lack of, is a consequence of how that doubt is handled.
The Bible provides many examples of how human beings deal with doubt, some constructively and others not.
There were those who did not have faith, because they doubted that Jesus was the Messiah; moreover,
their doubt arose from the denial that Jesus was the Messiah.
The Bible records many examples of the Jews’ refusal to accept the truth and reality of Jesus.
For example, rather than recognizing Jesus’ divine ability of healing
(Matt 8:16-17) and fulfillment of Messianic prophecy
(Isa 53:4), Jewish religious authorities attribute it to an evil
spirit, "He casts out demons by the ruler of demons" (Mark 3:22);
this contrived explanation had no basis in the Old Testament (Tanakh).
There were those who did not have faith, because they doubted that Jesus was God; Jesus the Savior
meant nothing to them. These people only sought personal glory and wealth.
The Bible speaks of false prophets and teachers who secretly introduce destructive heresies,
including the denial that Jesus was the Messiah, in greedy exploitation
(2 Pet 2:1-3) or prestige
(2 Cor 11:1-4, 13-15;
2 Thess 2:3-4;
1 John 2:18-22).
Simon the magician can be seen as an example of this
Simon thought highly of himself and claimed to be someone great
Simon "believed" the gospel, was baptized and observed amazing miracles
Simon did not desire the Holy Spirit for himself; instead, he sought the authority of dispensing
the Holy Spirit (Acts 8:14-19).
Simon did not understand the gospel and was never a genuine Believer. Simon’s belief in the gospel
can be seen as analogous to a demon’s belief (James 2:14) which was
an intellectual assent but not an understanding (1 Pet 1:10-12) or
trusting belief in the gospel.
There were those who did not have faith, because they doubted the gospel. They saw Christianity
as a lifestyle and thought they had faith, because they attended church.
Because the congregation of those who believed were of one heart and soul, and not one of them
claimed that anything belonging to him was his own (Acts 4:32),
Ananias and Sapphira’s decision to withhold some of the proceeds of their land sale indicted that they were not
Believers (Acts 5:1-2).
They apparently did not believe in the gospel expounded by the apostles Peter and John
(Acts 4:33), and Peter’s question of "putting the Spirit of the Lord
to test" demonstrated the discernment of the Holy Spirit. Ananias and Sapphira, in their conspiracy to withhold
money, did not believe that God was present and would know of their deceit.
There were those who did not have faith, because they had doubts that Jesus was the Messiah;
however, they recognized that Jesus was of God and wanted to learn more.
Nicodemus (John 3:2), made the effort to rationally
understand the truth of salvation that Jesus preached about (John 3:4).
However, Jesus chides the teacher of the Law (John 3:10); Nicodemus
should have been familiar with the principles of salvation written in the Old Testament
Jesus teaches the nature of faith to Nicodemus with an illustration of the bronze serpent
The nation of Israel was disobedient and spoke against God with their complaints of physical
salvation from Egypt (Num 21:4-5).
The nation was being punished for their sin with lethal snakes
The nation recognized that they sinned and were helpless of saving themselves
The nation had to trust God’s word and be obedient by looking at the bronze serpent for physical
salvation (Num 21:8-9).
Nicodemus learned that faith, the belief and trust in something true, recognized the reality
of man’s condition and God’s word, and that the object of a trusting faith was on God. This was in contrast to Jewish
teaching, which required obedience to the Law as a condition for salvation and blessing. And it appeared later that
Nicodemus believed that Jesus was the Messiah (John 19:38-39).
There were those who had faith in Jesus but had a variety of doubts, and yet were still obedient
In some ways like Nicodemus, the disciples had doubts because of their incomplete understanding
of the Messiah and His function (Matt 28:16-17;
However, they knew Jesus was the Messiah (Matt 16:13-20;
John 1:41, 45, 49), and when they became apostles, they received
supernatural help that enabled them to fully understand everything about the Messiah and the gospel
A trusting faith has the character of obedience.
The Bible does not provide an example of a genuine Believer who had doubts and then explicitly rejects Jesus as
the Messiah and denies His deity.
However Hebrews 6:4-8 is a passage that has been
contested as an example of a genuine Believer who "lost his faith." There are several phrases that indicate that
a genuine Believer is being discussed:
"those who have once been enlightened" is a phrase used of a Believer’s conversion and experience
(2 Cor 4:3-6;
"tasted of the heavenly gift" is a phrase that draws association to the gift of salvation
"have been made partakers of the Holy Spirit" is a phrase that refers to the indwelling of
the Holy Spirit which only occurs with Believers
1 Cor 3:16;
2 Tim 1:14).
"tasted the good word of God and the powers of the age to come" may be a reference to the blessing of
"the revelation in the knowledge of Jesus Christ" and the "surpassing greatness of His power towards those who believe"
Given that Believers are "born again" (John 3:3-5),
are "new creatures" (2 Cor 5:17-19) and given a pledge of their
inheritance with a view of their redemption as God’s own people, with the sealing of the Holy Spirit
(2 Cor 1:21-22;
4:30), it does not seem possible that a genuine Believer can
fall away (Heb 6:6).
Despite a genuine Believer’s struggle with sin until death, it seems clear that one cannot deceive
God if there were any future intent of apostasy (Heb 4:12-16).
In addressing immature Believers (Heb 5:11-14;
6:1) the writer of Hebrews appears to be answering an unspoken
question of whether a genuine Believer who deliberately defects and rejects Christ can return as a genuine Believer.
The response seems emphatically negative on this possibility as the defector would have such a hard heart that
repentance would be impossible and figuratively seen as a second crucifixion of Jesus
(Heb 6:6). The implication is that the person who fell away was
never a genuine Believer in the first place very much akin to Ananias and Sapphira, who outwardly exhibited the
behavior of genuine Believers (Acts 5:1-2), but were not
The reference to agriculture is reminiscent of Jesus’ parables and parallels the impossibility
of a genuine Believer becoming an apostate (Heb 6:7-8).
In the Parable of the Sower (Matt 13:1-9, 18-23;
Mark 4:1-9, 14-20;
Luke 8:4-8, 11-15), the seed sown, symbolic of the gospel, never
once yielded thorns or thistles. However in the Parable of the Tares
(Matt 13:24-30; 36-43), the enemy sowed seeds that yielded tares
(thorns). While both parables are in reference to the kingdom of God, the Parable of the Tares is clear as to what
happens to the thorns at harvest.
Of the examples seen above, there are two examples of constructive ways of dealing with doubt.
Nicodemus exemplified a non-Believer who pursued the truth by following up his questions, and
he ultimately realized that Jesus was indeed the Messiah and believed in Him.
The disciples exemplified Believers who, despite their doubts, were faithful and obedient to
Jesus. For their faith, they received the Holy Spirit who would help them understand the gospel and the truth of
Jesus. And this indwelling of the Holy Spirit occurs for all who have a genuine faith in Jesus Christ.
Jesus intended His assurance as a statement of historical fact
1 John 5:11-12). Those who genuinely have faith in Jesus Christ
will be forgiven of their sins and will have eternal life.
1. Gaebelein FE, ed., The Expositor’s Bible Commentary, vol. 8, 9, 10, Grand Rapids:
Zondervan Publishing House, (1976).
2. Brand C, Draper C and England A, eds., Holman Illustrated Bible Dictionary, Nashville:
Holman Bible Publishers, (1998).
3. Walvoord JF and Zuck RB, eds., Bible Knowledge Commentary, Wheaton: Victor Books,
4. Keener CS, The IVP Bible Background Commentary: New Testament, Downer’s Grove:
InterVarsity Press, (1993).