Peter would often come before Jesus in prayer, always feeling regret and indebted due to having not met God’s will and not measuring up to God’s standards. These issues became his biggest burden. He said: “One day I will dedicate to You everything I have and everything I am, and I will give You whatever is most valuable. God! My life is worth nothing, and my body is worth nothing. I have only one faith and only one love. I have faith in You in my mind and love for You in my heart; these two things only have I to give to You, and nothing else.” So when he was on the cross, he was able to say: “God! I cannot love You enough! Even if You ask me to die, I still cannot love You enough. Wherever You send my soul, whether or not You fulfill Your past promises, whatever You do afterward, I love You and believe in You.” What he held onto was his faith, and true love.
Adapted from “How Peter Came to Know Jesus” in The Word Appears in the Flesh