Submitting To God
Everybody wants a blessed life. Before God can thoroughly bless people He must break them from their own self-reliance. We saw that in Jacob who became Israel after being broken.
Regardless of Peter's hang-ups, Christ knew with His touch, the blow of the chisel here and the heavenly sandpaper there; Peter could be used to His glory.
God works to strip from our lives that which we depend upon. He wants us to depend on Him. He loves us too much to let us be our soulish self. He has bigger and better things for us.
Isaiah 64:8 But now, O Lord, thou art our father: we are the clay, and thou our potter; and we all are the work of thy hand.
Lord, what do you want me to do? How do you want me to live? Where do you want me to go? What do you want me to say? It's all about you--not me.