Augustine of Hippo
Catena Aurea · Matthäusevangelium 24
Then if any man shall say unto you, Lo, here is Christ, or there; believe it not. For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect. Behold, I have told you before. Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not. For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be. For wheresoever the carcase is, there will the eagles be gathered together.
(Quæst. Ev. i. 38.) By the east and west, He signifies the whole world, throughout which the Church should be. In the same way as He said below, Hereafter shall ye see the Son of Man coming in the clouds of heaven, (Mat. 26:64.) so now He likens His coming to lightning, which uses to flash out of the clouds. When then the authority of the Church is set up clear and manifest throughout the whole world, He suitably warns His disciples that they should not believe schismatics and heretics. Each schism and heresy holds its own place, either occupying some important position in the earth, or ensnaring men’s curiosity in obscure and remote conventicles. Lo, here is Christ, or lo, there, refers to some district or province of the earth; the secret chambers, or the desert, signify the obscure and lurking conventicles of heretics.