Luke 7:50

And He (Jesus) said to the woman, "Your faith has saved you; go in peace."

I notice here that Jesus did not say that His faith healed her, but that her faith healed her. This particular phrasing, repeated at other healings by Jesus, is a significant point in my view. God has the power but she had to believe in His power, and that is what healed her. This is what the words of Jesus say to me. And speaking itself also is important. Words have significant power for the believer. God spoke the worlds into existence. It is the same as yesterday as it is today and forever. Jesus had only to speak a word and the centurion's servant was healed. The centurion said this before his servant was yet healed. Matt 8:13 were then the words that Jesus spake.