Revelation belongs to allegory. According to it, what the historical narrative contains is explained in a spiritual sense. For example, we may try to unfold how “our fathers were all under the cloud, and all passed through the sea.”
“And all were baptized into Moses in the cloud and in the sea. And all ate the same spiritual food, and all drank the same spiritual drink. For they drank of the spiritual Rock that followed them, and the Rock was Christ” (1 Cor 10:1-4).
This explanation, in the sense of a prefiguration of the Body and Blood of Christ, which we receive daily, constitutes the manner of allegorical interpretation.
The knowledge also mentioned by the Apostle is tropology. By it, through prudent inquiry, we discern everything that pertains to practical discretion, and what is useful or honorable.
For example: “Judge for yourselves: is it proper for a woman to pray to God with her head uncovered?” (1 Cor 11:13). This explanation, as has been said, contains the moral sense.
Likewise prophecy, which the Apostle placed third, signifies anagogy. It pertains to what is invisible and future. For example: “But I do not want you to be ignorant, brethren, concerning those who have fallen asleep.”
“Do not sorrow as others who have no hope. For if we believe that Jesus died and rose again, even so God will bring with Him those who have fallen asleep in Jesus.”
“For this we say to you by the word of the Lord, that we who are alive and remain until the coming of the Lord will not precede those who have fallen asleep.”
“For the Lord Himself will descend from heaven with a shout, with the voice of the Archangel, and with the trumpet of God. And the dead in Christ will rise first” (1 Thess 4:13-16). This explanation will be anagogical.
Teaching signifies the simple order of the exposition of history. In it no hidden sense is contained beyond what is signified by the words. For example: “For I delivered to you first of all that which I also received.”
“That Christ died for our sins according to the Scriptures, and that He was buried, and that He rose again the third day according to the Scriptures, and that He appeared to Cephas” (1 Cor 15:3-5).
“God sent forth His Son, His Only-begotten, born of a woman, made under the law, to redeem those who were under the law” (Gal 4:4-5). Or this: “Hear, O Israel: the Lord our God, the Lord is one” (Deut 6:4).