Greek Expositor
Catena Aurea · Lukasevangelium 3
And as the people were in expectation, and all men mused in their hearts of John, whether he were the Christ, or not; John answered, saying unto them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire. Whose fan is in his hand, and he will throughly purge his floor, and will gather the wheat into his garner; but the chaff he will burn with fire unquenchable.
(ubi sup.) By these words then, He shall baptize with the Holy Spirit, He signifies the abundance of His grace, the plenteousness of His mercy; but lest any should suppose that while to bestowabundantly is both in the power and will of the Creator, He will have no occasion to punish the disobedient, he adds, whose fan is in his hand, shewing that He is not only the rewarder of the righteous, but the avenger of them that speak lies. But the fan expresses the promptitude of His judgment. For not with the process of passing sentence on trial, but in an instant and without any interval he separates those that are to be condemned from the company of those that are to be saved.