Matthew 21:23

But if the Lord come seeking fruit with temptations, and one be found having nought of righteousness but only a profession of faith, which is leaves without fruit, he is soon withered, losing even his seeming faith; and every disciple makes this fig tree to wither, by making it be seen that he is void of Christ, as Peter said to Simon, Thy heart is not right in the sight of God (Acts 8:21.) For it is better that a deceitful fig tree which is thought to be alive, yet brings forth no fruit, should be withered up at the word of Christ's disciples, than that by an imposture it should steal aawy innocent hearts. Also there is in every unbeliever a mountain great in proportion to his unbelief, which is removed by the words of Christ's disciples. But some one will say in opposition to this, that it was absurd to ask by what authority Jesus did these things. For that it could not be that He would answer, that He did these by the Devil's authority; and He would not tell them as it truly was, that He did them by His own power. If it should be said, that the rulers put this question to Him in order to deter Him from His proceedings; as when we say to one who is dealing with what is ours in a way which we do not like, we say to him, Who bade thee do this? meaning to deter him from what he is so doing;—if it is to be taken so, what means Christ's answer, Do you tell Me this, and I will tell you by what authority I do these things. Perhaps therefore, the place should be understood as follows. There are in the general two opposite powers, one on the side of God, the other on the side of the Devil; but of particular powers there are many; for it was not one and the same power that wrought in all the Prophets to enable them to do miracles, but one in these, another in those; and, it may be, for lesser things a lesser power, for greater things a greater power. […]

Prior to this, the Pharisees had seen many things more worthy to be called great miracles, but now they were deeply troubled and asked Jesus to identify the authority by which he performed these works. The great mystery of the future is included in the consequences of present deeds. They felt the urge for special questioning, then, because the prefiguration of every danger was made known in this event. The Lord replied that he would tell them by what authority he did these works if only they would also reply to his question about whether they considered John the Baptist to have come from heaven or from man. They hesitated while pondering the dangers of responding. If they confessed John to have come from heaven, they would be convicted by that very confession for not believing in the authority of a heavenly witness. They were afraid to say that he was merely from man, however, because of the large crowd of people who believed John to be a prophet. So they answered that they did not know (they did in fact know him to be from heaven) because they feared that they might be convinced by the truth of their own confession. But they told the truth about themselves, even though it was their intention to deceive; it was only through their infidelity that they did not know John the Baptist to be from heaven. And they could not have known that John the Baptist was from man, because he was not.

We have spoken, so far as our moderate ability permitted, of the generals which form the groundwork of the sanctity of baptism. I will now, equally to the best of my power, proceed to the rest of its character, touching certain minor questions. The baptism announced by John formed the subject, even at that time, of a question, proposed by the Lord Himself indeed to the Pharisees, whether that baptism were heavenly, or truly earthly: about which they were unable to give a consistent answer, inasmuch as they understood not, because they believed not. But we, with but as poor a measure of understanding as of faith, are able to determine that that baptism was divine indeed, (yet in respect of the command, not in respect of efficacy too, in that we read that John was sent by the lord to perform this duty, ) but human in its nature: for it conveyed nothing celestial, but it fore-ministered to things celestial; being, to wit, appointed over repentance, which is in man's power. In fact, the doctors of the law and the Pharisees, who were unwilling to "believe," did not "repent" either. But if repentance is a thing human, its baptism must necessarily be of the same nature: else, if it had been celestial, it would have given both the Holy Spirit and remission of sins. But none either pardons sins or freely grants the Spirit save God only. Even the Lord Himself said that the Spirit would not descend on any other condition, but that He should first ascend to the Father. What the Lord was not yet conferring, of course the servant could not furnish. Accordingly, in the Acts of the Apostles, we find that men who had "John's baptism" had not received the Holy Spirit, whom they knew not even by hearing. […]

(Verse 23.) And when he came into the temple, the chief priests and the elders of the people approached him as he was teaching, saying, 'By what authority are you doing these things, and who gave you this authority?' In different words, they construct the same accusation as before, when they said, 'He casts out demons by Beelzebub, the prince of demons.' For when they say, 'By what authority are you doing these things?' they doubt the authority of God and want it to be understood that what he does is by the power of the devil. Moreover, they added: Who gave you this authority? They openly deny the Son of God, whom they consider to be not working by his own power, but by the power of others, to perform miracles.

The Priests were tormented with jealousy, because they had seen Christ entering the Temple in great glory. And not being able to master the fire of jealousy which burnt in their breasts, they break forth in speech. By that they add, Or who gave thee this authority? they show that there be many persons who give power to men, whether corporal or spiritual! as though they had said, Thou art not come of a priestly family; the Senate has not conferred on Thee this power, neither has Cæsar granted it. But had they believed that all power is from God, they would never have asked, Who gave thee this authority? For every man judges of others by himself. The fornicator thinks that none are chaste; the chaste does not readily suspect any of fornication; he who is not a Priest of God, thinks no man's Priesthood to be of God.