John Calvin, Harmony of the Gospels, V.2 on Matthew 17:8
They saw no man but Jesus only. When it is said that in the end they saw Christ alone, this means that the Law and the Prophets had a temporary glory, that Christ alone might remain fully in view. If we would properly avail ourselves of the aid of Moses, we must not stop with him, but must endeavor to be conducted by his hand to Christ, of whom both he and all the rest are ministers. This passage may also be applied to condemn the superstitions of those who confound Christ not only with prophets and apostles, but with saints of the lowest rank, in such a manner as to make him nothing more than one of their number. But when the saints of God are eminent in graces, it is for a totally different purpose than that they should defraud Christ of a part of his honor, and appropriate it to themselves. In the disciples themselves we may see the origin of the mistake; for so long as they were terrified by the majesty of God, their minds wandered in search of men, but when Christ gently raised them up, they saw him alone. If we are made to experience that consolation by which Christ relieves us of our fears, all those foolish affections, which distract us on every hand, will vanish away.
It’s obvious that being seized by prejudice against Calvin is simply a way to deprive yourself of great blessing.