21 The Synagogue has not this oil, inasmuch as she has not the olive, and understood not that dove which brought back the olive branch after the deluge. For that Dove descended afterwards when Christ was baptized, and abode upon Him, as John testified in the Gospel, saying: “I saw the Spirit descending from heaven like a dove, and He abode upon Him.” But how could he see the Dove, who saw not Him, upon Whom the Spirit descended like a dove?
Source: Letters (New Advent)