1. What observations of the apostle John's statement that explains the association between grace and truth? What observations explain the apostle John's meaning of "grace upon grace?"

And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth. (John bore witness about him, and cried out, "This was he of whom I said, ‘He who comes after me ranks before me, because he was before me.'") For from his fullness we have all received, grace upon grace. For the law was given through Moses; grace and truth came through Jesus Christ. (John 1:14-17, ESV)

2. In the above question, God responds with grace when Old Testament "Believers" constantly disobeyed and irrevocably broke their covenant promise to follow His word. In same manner, despite false accusations, torture, and ultimate death by crucifixion by human beings, Jesus responds with grace; God sacrifices His only Son and Jesus sacrifices His life so that the means of salvation is available for all. What do your observations of these biblical passages inform you about responding to others, whether Believer or not, who sin against you?

Walk in wisdom toward outsiders, making the best use of the time. Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer each person. (Col 4:5-6, ESV)

For this is a gracious thing, when, mindful of God, one endures sorrows while suffering unjustly. For what credit is it if, when you sin and are beaten for it, you endure? But if when you do good and suffer for it you endure, this is a gracious thing in the sight of God. For to this you have been called, because Christ also suffered for you, leaving you an example, so that you might follow in his steps. He committed no sin, neither was deceit found in his mouth. When he was reviled, he did not revile in return; when he suffered, he did not threaten, but continued entrusting himself to him who judges justly. He himself bore our sins in his body on the tree, that we might die to sin and live to righteousness. By his wounds you have been healed. (1 Pet 2:19-24, ESV)

For if you forgive others their trespasses, your heavenly Father will also forgive you, but if you do not forgive others their trespasses, neither will your Father forgive your trespasses. (Matt 6:14-15, ESV)

Then Peter came up and said to him, "Lord, how often will my brother sin against me, and I forgive him? As many as seven times?" Jesus said to him, "I do not say to you seven times, but seventy-seven times. (Matt 18:21-22, ESV)