Matthew 26:75 "And Peter remembered the word of Jesus, which said unto him, Before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly."
I was talking with someone last night about failing the Lord and how to keep going after having done that. I can speak from experience on this issue as I'm sure many if not all of us can. I have failed Him many, many times. Yet when I realize I have failed Him and I come to Him about that failure He is always there to forgive me and set me back on track.
Peter knew about failure. He failed the Lord when he denied Christ three times. Even though Peter denied the Lord three times and failed Him like he did...God still saw fit to use him to pen the books of I and II Peter in the Word of God. What made the difference is that Peter saw his failure and learned from it. Peter did not let his failure keep him down and out.
In I Peter 5:6 "Humble yourselves therefore under the mighty hand of God, that he may exalt you in due time:" I believe God is using Peter as he writes to encourage us. We are not to fight the sovereign hand of God. In times of despair and failure...it can seem like an eternity waiting for God to hear our prayers of confession and humility. We feel as though God is a million miles away during these times...but He is not. He is with us...waiting and willing to forgive.
Maybe you have failed the Lord in some area of your life. The best thing to do is face your failure...confess it and turn from it. Your experience with failure could help other Christians when they are going through a downfall. God desires to use each experience we go through to help someone else. Thank the Lord when we can take our downfalls and turn them into blessings in someone else's life.