A.T. Robertson Commentary Mark 4:40

"And he said unto them, Why are ye fearful? have ye not yet faith?" — Mark 4:40 (ASV)

Why are ye fearful? (Τ δειλο εστε; ). They had the Lord of the wind and the waves with them in the boat. He was still Master even if asleep in the storm.

Have ye not yet faith? (Ουπω εχετε πιστιν; ). Not yet had they come to feel that Jesus was really Lord of nature. They had accepted his Messiaship, but all the conclusions from it they had not yet drawn. How like us in our troubles they were!