O thou of little faith, wherefore didst thou doubt? Matthew 14:31.
Looking unto Jesus, Peter walks securely; but as in self-satisfaction he glances back toward his companions in the boat, his eyes are turned from the Saviour. The wind is boisterous. The waves roll high.... For a moment Christ is hidden from his view, and his faith gives way. He begins to sink. But while the billows talk with death, Peter lifts his eyes from the angry waters, and fixing them upon Jesus, cries, “Lord, save me.” Immediately Jesus grasps the outstretched hand, saying, “O thou of little faith, wherefore didst thou doubt?”
Walking side by side, Peter's hand in that of his Master, they stepped into the boat together. But Peter was now subdued and silent. He had no reason to boast over his fellows, for through unbelief and self-exaltation he had very nearly lost, his life. When he turned his eyes from Jesus, his footing was lost and he sank amid the waves.
When trouble comes upon us, how often we are like Peter! We look upon the waves, instead of keeping our eyes fixed upon the Saviour. Our footsteps slide, and the proud waters go over our souls. Jesus did not bid Peter come to Him that he should perish; He does not call us to follow Him, and then forsake us....
In this incident on the sea He desired to reveal to Peter his own weakness,—to show that his safety was in constant dependence upon divine power. Amid the storms of temptation he could walk safely only as in utter self-distrust he should rely upon the Saviour. It was on the point where he thought himself strong that Peter was weak; and not until he discerned his weakness could he realize his need of dependence upon Christ. Had he learned the lesson that Jesus sought to teach him in that experience on the sea, he would not have failed when the great test came upon him.
Day by day God instructs His children. By the circumstances of the daily life He is preparing them to act their part upon that wider stage to which His providence has appointed them. It is the issue of the daily test that determines their victory or defeat in life's great crisis.50Ibid., 381, 382.
From Conflict and Courage - Page 310