Matthew 24:26

Or, when they allege secret and before unpublished Scriptures, in proof of their lie, they seem to say, Lo, the word of truth is in the desert. But when they produce canonical Scripture in which all Christians agree, they seem to say, Lo, the word of truth is in the chambers. Or wishing to point out such discourses as are altogether without Scripture, He said, If they shall say to you, Lo, he is in the secret chambers, believe it not. Truth is like the lightning that cometh out of the east, and shineth even unto the west. Or this may mean, that truth can be supported out of every passage of Scripture. The lightning of truth comes out of the east, that is, from the first beginnings of Christ, and shines throughout even to His passion, which is His setting; or from the very beginning of creation, to the last Scripture of the Apostles. Or, the east is the Law, the west is the end of the Law, and of John's prophecy. The Church alone neither takes away word or meaning from this lightning, nor adds aught to its prophecy. Or He means that we should give no heed to those who say, Lo, here is Christ, but show Him not in the Church, in which alone is the coming or the Son of Man, who said, Lo, I am with you always, even to the end of the world. (Mat. 28:20.)

The false prophets, of whom He had spoken above, shall say of Christ one while, Lo, He is in the desert, in order that they may cause men to wander astray; another while, Lo, He is in the secret chambers, that they may enthral men under the dominion of Antichrist. But the Lord declares Himself to be neither lurking in a remote corner, nor shut up to be visited singly, but that He shall be exhibited to the view of all, and in every place, As the lightning cometh out of the east, and shineth even unto the west, so shall the coming of the Son of Man be.

And see how He secures them; "Go not forth into the deserts, enter not into the secret chambers." He did not say, "Go, and do not believe;" but, "Go not forth, neither depart thither." For great then will be the deceiving, because that even deceiving miracles are wrought.

(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.

If then any one assert to you that Christ tarries in the desert of the Gentiles, or in the teaching of the Philosophers, or in the secret chambers of the heretics, who promise the hidden things of God, believe Him not, but believe that the Catholic Faith shines from east to west in the Churches. Or by this, in the desert, or in the secret chambers, He means that in times of persecution and distress, the false Prophets always find place for deceiving.