And how can the following assertion of this Jew of Celsus appear anything else than a manifest falsehood, viz., that Jesus, “having gained over no one during his life, not even his own disciples, underwent these punishments and sufferings?” For from what other source sprang the envy which was aroused against Him by the Jewish high priests, and elders, and scribes, save from the fact that multitudes obeyed and followed Him, and were led into the deserts not only by the persuasive language of Him whose words were always appropriate to His hearers, but who also by His miracles made an impression on those who were not moved to belief by His words?
And is it not a manifest falsehood to say that “he did not gain over even his own disciples,” who exhibited, indeed, at that time some symptoms of human weakness arising from cowardly fear— for they had not yet been disciplined to the exhibition of full courage— but who by no means abandoned the judgments which they had formed regarding Him as the Christ? For Peter, after his denial, perceiving to what a depth of wickedness he had fallen, “went out and wept bitterly;” while the others, although stricken with dismay on account of what had happened to Jesus (for they still continued to admire Him), had, by His glorious appearance, their belief more firmly established than before that He was the Son of God.
Source: Against Celsus (New Advent)