Habakkuk 2:4 Behold, his soul which is lifted up is not upright in him: but the just shall live by his faith.
Indeed it was that that saved many a person, in Jesus' day there many who Jesus couldn't heal because of lack of faith. Oh let us never lack faith! How many times did Jesus say in the Bible "O ye of little faith"? I want you to go to your Bible and see, and then tell me.
The disciples and Jesus were on the lake and Jesus was asleep. And then the winds were blowing a gale, the disciples were afraid, even though the Saviour of the whole world was there, - asleep. And they doubted and became afraid! and said Lord save us! We perish.
Matthew 8:26 And he saith unto them, Why are ye fearful, O ye of little faith? Then he arose, and rebuked the winds and the sea; and there was a great calm.
If they had had faith, they would have been sure of safety, and not been afraid because Jesus was with them, the same as He is with us all the time. Though we do with the mortal eye see him, Jesus is ever by our side, ready to catch us, and to hold us up, if only we would have faith. What is faith? It a question for you to answer. (on "comments".)