John 21:15–25 (ESV) — 15 When they had finished breakfast, Jesus said to Simon Peter, “Simon, son of John, do you love me more than these?” He said to him, “Yes, Lord; you know that I love you.” He said to him, “Feed my lambs.” 16 He said to him a second time, “Simon, son of John, do you love me?” He said to him, “Yes, Lord; you know that I love you.” He said to him, “Tend my sheep.” 17 He said to him the third time, “Simon, son of John, do you love me?” Peter was grieved because he said to him the third time, “Do you love me?” and he said to him, “Lord, you know everything; you know that I love you.” Jesus said to him, “Feed my sheep.

Matthew 26:30–35 (ESV) — 30 And when they had sung a hymn, they went out to the Mount of Olives. 31 Then Jesus said to them, “You will all fall away because of me this night. For it is written, ‘I will strike the shepherd, and the sheep of the flock will be scattered.’ 32 But after I am raised up, I will go before you to Galilee.” 33 Peter answered him, “Though they all fall away because of you, I will never fall away.” 34 Jesus said to him, “Truly, I tell you, this very night, before the rooster crows, you will deny me three times.” 35 Peter said to him, “Even if I must die with you, I will not deny you!”…

Galatians 6:4 (NIV84) — 4 Each one should test his own actions. Then he can take pride in himself, without comparing himself to somebody else.

1 Timothy 3:6 (ESV) He must not be a recent convert, or he may become puffed up with conceit and fall into the condemnation of the devil.

Lessons learned from Peter’s denial, forgiveness, and call into ministry.