John 2:24

Trust himself to them. The Fathers generally understand these words, to them, to refer to those who believed in him, mentioned in the preceding verse. Though they believed in him, he did not trust himself to them, because he knew them. He knew their weakness, their inconstancy, their unsteadiness. He knew they would abandon him on the first occasion; and that his passion, his cross, his doctrines, would be a subject of scandal. St. Augustine compares these first believers to catechumens. They believe in Christ, confess his name, and sign their foreheads with his cross: but Jesus Christ does not trust himself to them; he does not trust to them the knowledge of his mysteries; he does not reveal to them the secrets of his religion. (Calmet) — The catechumens were not allowed to be present at the holy mysteries of the sacrifice of the mass, but went out after the instruction of the gospel; whence the first part of the mass was frequently called the mass of the catechumens.

III. That yet Jesus did not commit himself unto them (v. 24): ouk episteuen heauton autois—He did not trust himself with them. It is the same word that is used for believing in him. So that to believe in Christ is to commit ourselves to him and to his guidance. Christ did not see cause to repose any confidence in these new converts at Jerusalem, where he had many enemies that sought to destroy him, either, 1. Because they were false, at least some of them, and would betray him if they had an opportunity, or were strongly tempted to do so. He had more disciples that he could trust among the Galileans than among the dwellers at Jerusalem. In dangerous times and places, it is wisdom to take heed in whom you confide; memneso apistein—learn to distrust. Or, 2. Because they were weak, and I would hope that this was the worst of it; not that they were treacherous and designed him a mischief, but, (1.) They were timorous, and wanted zeal and courage, and might perhaps be frightened to do a wrong thing. In times of difficulty and danger, cowards are not fit to be trusted. Or, (2.) They were tumultuous, and wanted discretion and management. These in Jerusalem perhaps had their expectations of the temporal reign of the Messiah more raised than others, and, in that expectation, would be ready to give some bold strokes at the government if Christ would have committed himself to them and put himself at the head of them; but he would not, for his kingdom is not of this world. We should be shy of turbulent unquiet people, as our Master here was, though they profess to believe in Christ, as these did.

Verses 23-25 Our Lord knew all men, their nature, dispositions, affections, designs, so as we do not know any man, not even ourselves. He knows his crafty enemies, and all their secret projects; his false friends, and their true characters. He knows who are truly his, knows their uprightness, and knows their weaknesses. We know what is done by men; Christ knows what is in them, he tries the heart. Beware of a dead faith, or a formal profession: carnal, empty professors are not to be trusted, and however men impose on others or themselves, they cannot impose on the heart-searching God.