But Jesus did not commit himself unto them, because he knew all men,
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Cornelius a Lapide
AD 1637
But Jesus did not, &c. He did not trust, i.e, He did not confide. For although He knew that they believed in Him, yet He also knew that they were fickle, and would easily fall back from this faith, and be perverted by His numerous enemies, the Scribes and Pharisees. For the authority and power of those men was great. For this reason Christ neither securely, nor for long, conversed with them, but went away into other parts of Judea, for He knew not only what they were then doing and thinking, but what they were hereafter about to think and do against Him, to persecute Him even unto the death of the cross.
Not firmly established is the judgment of new believers, nor is the mind firmly built upon fresh miracles. And how should they whose course of instruction was yet so to say green, be already rooted in piety? Therefore Christ doth not yet commit Himself to the novices, shewing that a great thing and most worthy of love is affinity with God, and that it doth not just lie before those who desire to have it, but is achieved by zeal for good, and diligence and time.
Let the stewards of the Mysteries of the Saviour hence learn, not suddenly to admit a man within the sacred veils, nor to permit to approach the Divine Tables, neophites untimely baptized and not in right time believing on Christ the Lord of all. For that He may be an Ensample to us in this also, and may teach us whom fittingly to initiate, He receives indeed the believers, but is seen not yet to have confidence in them, in that He does not commit Himself to them: that hence it may be manifest, that it befits novices to spend...
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.
For they were the more perfect among His disciples, who came to Him not only because of His miracles, but through His teaching also. The grosser sort the miracles attracted, but the better reasoners His -->prophecies--> and doctrines; and so they who were taken by His teaching were more steadfast than those attracted by His miracles. And Christ also called them blessed, saying, Blessed are they that have not seen, and yet have believed. John 20:29 But that these here mentioned were not real disciples, the following passage shows, for it says, Jesus did not commit Himself unto them. Wherefore? Because He knew all things,