Luke 2:24

(ubi sup.) He ordered two things to be offered, because as man consists of both body and soul, the Lord requires a double return from us, chastity and meekness, not only of the body, but also of the soul. Otherwise, man will be a dissembler and hypocrite, wearing the face of innocence to mask his hidden malice.

Now this was the victim of the poor. For the Lord commanded in the law that they who were able should offer a lamb for a son or a daughter as well as a turtle dove or pigeon; but they who were not able to offer a lamb should give two turtle doves or two young pigeons. Therefore the Lord, though he was rich, deigned to become poor, that by his poverty He might make us partakers of His riches.

Or the pigeon denotes simplicity, the turtle dove chastity, for the pigeon is a lover of simplicity, and the turtle dove of chastity, so that if by chance she has lost her mate, she heeds not to find another. Rightly then are the pigeon and turtle dove offered as victims to the Lord, because the simple and chaste conversation of the faithful is a sacrifice of righteousness well pleasing to Him.

But while each bird, from its habit of wailing, represents the present sorrows of the saints, in this they differ, that the turtle is solitary, but the pigeon flies about in flocks, and hence the one points to the secret tears of confession, the other to the public assembling of the Church.

Or the pigeon which flies in flocks sets forth the busy intercourse of active life. The turtle, which delights in solitariness, tells of the lofty heights of the contemplative life. But because each victim is equally accepted by the Creator, St. Luke has purposely omitted whether the turtles or young pigeons were offered for the Lord, that he might not prefer one mode of life before another, but teach that both ought to be followed.