Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 102. Moreover, such phraseology is in perfect accordance with the usage of the Holy Scriptures, which call things by what they appear to be, as may be seen from the words of Genesis which say that Abraham saw three men, when in reality he saw three Angels. In like manner the two Angels who appeared to the Apostles after the Ascension of Christ the Lord into heaven, are called not Angels, but men.