Matthew 14:26-27

And when the disciples saw him, they were troubled “It is well known that it is never entirely dark on the water not to urge that the moon might perhaps now be in the last quarter, as it must have been, if this was about three weeks before the passover.” By that little light, therefore, which they had, the disciples, seeing him, but not perfectly discerning who he was, were much terrified: saying, It is a spirit, Οτι φαντασμα εστι, It is an apparition: for they justly supposed that no human body could be supported by the water. Although the original word here used is not spirit, but apparition, yet that the Jews in general, particularly the Pharisees, believed in the existence of spirits, and that spirits sometimes appeared, is evident from Luke 24:37; Luke 24:39, and Acts 23:8. And they cried out with fear Through their dread of what might be the consequence: for, Mark 6:50, they all saw him, and were troubled. We see here, that even appearances and approaches of deliverance may be the occasions of trouble and perplexity to God's people, who are sometimes put into great fear when they are most highly favoured. See Luke 1:29, and Exodus 3:6. To allay the fears of his disciples, Christ immediately drew near and spake to them, in a tone of voice with which they were all perfectly acquainted, saying, θαρσειτε, Take courage: it is I Your Lord and Master; be not afraid Either of me, who am your friend, or of the violent tempest, which cannot hurt you while you are under my protection.