Many believed. The Evangelist appropriately connects this narrative with the former. Christ had not given such a sign as the Jews demanded; and now, when he produced no good effect on them by many miracles -- except that they entertained a cold faith, which was only the shadow of faith -- this event sufficiently proves that they did not deserve that he should comply with their wishes. It was, indeed, some fruit of the signs, that many believed in Christ, and in his name, so as to profess that they wished to follow his doctrine; for name is here put for authority. This appearance of faith, which hitherto was fruitless, might ultimately be changed into true faith, and might be a useful preparation for celebrating the name of Christ among others; and yet what we have said is true, that they were far from having proper feelings, so as to profit by the works of God, as they ought to have done. Yet this was not a pretended faith by which they wished to gain reputation among men; for they were convinced that Christ was some great Prophet, and perhaps they even ascribed to him the honor of being the Messiah, of whom there was at that time a strong and general expectation. But as they did not understand the peculiar office of the Messiah, their faith was absurd, because it was exclusively directed to the world and earthly things. It was also a cold belief, and unaccompanied by the true feelings of the heart. For hypocrites assent to the Gospel, not that they may devote themselves in obedience to Christ, nor that with sincere piety they may follow Christ when he calls them, but because they do not venture to reject entirely the truth which they have known, and especially when they can find no reason for opposing it. For as they do not voluntarily, or of their own accord, make war with God, so when they perceive that his doctrine is opposed to their flesh and to their perverse desires, they are immediately offended, or at least withdraw from the faith which they had already embraced. When the Evangelist says, therefore, that those men believed, I do not understand that they counterfeited a faith which did not exist, but that they were in some way constrained to enroll themselves as the followers of Christ; and yet it appears that their faith was not true and genuine, because Christ excludes them from the number of those on whose sentiments reliance might be placed. Besides, that faith depended solely on miracles, and had no root in the Gospel, and therefore could not be steady or permanent. Miracles do indeed assist the children of God in arriving at the truth; but it does not amount to actual believing, when they admire the power of God so as merely to believe that it is true, but not to subject themselves wholly to it. And, therefore, when we speak generally about faith, let us know that there is a kind of faith which is perceived by the understanding only, and afterwards quickly disappears, because it is not fixed in the heart; and that is the faith which James calls dead; but true faith always depends on the Spirit of regeneration, (James 2:17, 20, 26.) Observe, that all do not derive equal profit from the works of God; for some are led by them to God, and others are only driven by a blind impulse, so that, while they perceive indeed the power of God, still they do not cease to wander in their own imaginations.

Feast-day - Feast. During the celebration of the Passover, which continued eight days.
Miracles which he did - These miracles are not particularly recorded. Jesus took occasion to work miracles, and to preach at that time, for a great multitude were present from all parts of Judea. It was a favorable opportunity for making known his doctrines and showing the evidence that he was the Christ, and he embraced it. We should always seek and embrace opportunities of doing good, and we should not be "deterred," but rather "excited," by the multitude around us to make known our real sentiments on the subject of religion.

Many believed in his name - They believed him to be the promised Messiah, but did not believe in him to the salvation of their souls: for we find, from the following verse, that their hearts were not at all changed, because our blessed Lord could not trust himself to them.

Now when he was in Jerusalem at the passover,.... Whither he went, in order to keep it, that being at hand, and now come; see John 2:13;
in the feast day; either on the day the Chagigah was eaten, which was sometimes emphatically called "the feast", as in Numbers 28:16, "and in the fourteenth day of the first month, is the passover of the Lord; and in the fifteenth day of this month, is the feast"; the passover lamb was eaten on the fourteenth day of the month "Nisan", and the "Chagigah" was on the fifteenth; in the former only a lamb was eaten, in the other, cattle out of the herds; hence mention is made, both of flocks and herds, for the keeping the passover, Deuteronomy 16:2. Jarchi's note upon the place is, that the herds were for the Chagigah, with which the Talmud (l) agrees; and Jonathan ben Uzziel paraphrases the words thus,
"and ye shall slay the passover before the Lord your God, between the evenings, and the sheep and oxen on the morrow, in that very day, for the joy of the feast;''
for it was observed with great joy and mirth: and the rather this is here meant, since the "Chagigah" is not only called "the feast", but this here is distinguished from the passover, as that is in the passage above cited, Numbers 28:16. For the passover here, seems to be the general name for the whole seven days of the festival; and the feast to be the particular feast of the first day of it, which was the fifteenth; to which may be added, that on this day all the males made their appearance in court (m); and so was a very proper time for Christ to work his miracles in, when there were so many spectators: though it may design the whole time of the feast, all the seven days of unleavened bread; during which time Christ was at Jerusalem, and wrought miracles, which had the following effect:
many believed in his name; that he was some great prophet, or the prophet, or the Messiah; they gave an historical assent unto him as such, at least for that time:
when they saw the miracles which he did; for as miracles, according to the prophecies of the Old Testament, were to be performed by the Messiah, such as giving sight to the blind, causing the deaf to hear, the dumb to speak, and the lame to walk, Isaiah 35:5; so they were expected by the ancient Jews, that they would be wrought by him, when he came; wherefore these Jews, seeing such like wonderful things wrought by Jesus, they concluded he must be the Messiah: though the modern ones, in order to shift off the evidence of Jesus being the Messiah, from his miracles, deny that miracles are the characteristic of the Messiah, or will be performed by him; at least, that there is no necessity of them to prove him to be the person. What miracles these were, which were now wrought by Christ, are not recorded by this, or any other evangelist; see John 20:30. However, being surprised at the marvellous things he did, and upon the evidence of these extraordinary works, there were many that concluded he must be come from God; among these it seems as if Nicodemus was one; see John 3:2; great part of these, at least some of them, were only nominal and temporary believers, who were not to be confided in as true disciples, and hearty followers of Christ; and who continued not long in the same mind and profession, as appears by what follows.
(l) Pesachim, fol. 70. 2. (m) Maimon. Hilch. Chagigah, c. 1. sect. 1.

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.

in the feast day--the foregoing things occurring probably before the feast began.
many believed--superficially, struck merely by "the miracles He did." Of these we have no record.

Many believed. The miracles wrought that they saw at this time are not recorded. They are alluded to again in John 3:2. These believed that he was a man sent from God, but did not trust in him as the Christ. The nature of their belief is stated in John 3:2.

Many believed - That he was a teacher sent from God.