Mateus 19
Bernard of Clairvaux
Mateus 19:12
From these things it is gathered that the voice of the turtledove is also the preaching of chastity. For in the beginning this voice was not heard on earth, but rather that one: "Increase and multiply and fill the earth" (Gen 1:28). In vain indeed would the voice of chastity have sounded, when the homeland of those rising again had not yet been revealed: in which far more happily "men will neither marry nor be given in marriage, but are as the angels of God in heaven" (Lk 20:35-36). You would say that there was a time for that voice, when every barren woman in Israel was subject to a curse, when the Patriarchs themselves had several wives at the same time, when a brother was compelled by the law to raise up offspring for a brother who had died without children. But when the commendation of those eunuchs "who have made themselves eunuchs for the sake of the kingdom of God" (Mt 19:12) sounded from the mouth of the heavenly turtledove; and likewise the counsel of another, that same most chaste turtledove, concerning virgins everywhere prevailed (1 Cor 7:25), then for the first time it could be truly said, that "the voice of the turtledove has been heard in our land." — Sermons on the Song of Songs, Sermon 59
Mateus 19:27
Notice that the love of the heart is, in a certain sense, carnal, because our hearts are attracted most toward the humanity of Christ and the things he did or commanded while in the flesh. The heart that is filled with this love is quickly touched by every word on this subject. Nothing else is as pleasant to listen to, or is read with as much interest, nothing is as frequently in remembrance or as sweet in reflection. I think this is the principal reason why the invisible God willed to be seen in the flesh and to converse with men as a man. He wanted to recapture the affections of carnal men who were unable to love in any other way, by first drawing them to the salutary love of his own humanity, and then gradually to raise them to a spiritual love. Were they not at just this level when they said: "See, we have left everything and have followed you"? It was only by the love of his physical presence that they had left everything. — Sermons on the Song of Songs, Sermon 20