Note 7 at Mt 14:31: It wasn't Jesus' fault that Peter began to sink; it was because of Peter's doubt. However, Jesus immediately reached out and saved Peter without any hesitation. This shows the willingness and compassion of Jesus to save us regardless of what we did to bring the problem on ourselves.

Note 8 at Mt 14:31: What did Peter doubt? He didn't doubt that Jesus could walk on the water. He doubted that he could walk on the water even though Jesus had told him he could by saying "come."

Many of us think that we are operating in all the faith we need if we believe that God can perform the miracle we are requesting. But we aren't using the faith that gets results until we believe it works for us. We not only have to believe that God is (i.e., God is able), but we also have to believe that He rewards us with our answers (Heb 11:6).

Many people who believe that God heals have not been healed, because they haven't believed that God gave them the power to receive that healing. Just as in Peter's situation, Satan doesn't throw doubt on God's ability to perform but on people's ability to receive.