When Peter's attention turned to the waves and
when he felt the wind, he began to be afraid. So
as the fear took hold of him, he began to sink. He
cried out to Jesus to save him. And Jesus did.

Would Jesus have had to let Peter drown, if he
hadn't cried out to him (Jesus) to save him? Surely
being a good fisherman he was use to the water
and was a good swimmer, but in this great storm
would he have been able to survive on his own?

Peter didn't have the faith to continue walking on
the water but he had faith that Jesus would save
him.