
Gregory the Great
Catena Aurea · Matthäusevangelium 3
I indeed baptize you with water unto repentance: but He that cometh after me is mightier than I, Whose shoes I am not worthy to bear: 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 gather His wheat into the garner; but He will burn up the chaff with unquenchable fire.
(Mor. xxxiv. 5.) After the threshing is finished in this life, in which the grain now groans under the burden of the chaff, the fan of the last judgment shall so separate between them, that neither shall any chaff pass into the granary, nor shall the grain fall into the fire which consumes the chaff.