19 And since we have touched on things connected with Paradise, I am truly astonished at the truth of the types. In Paradise was the Fall, and in a Garden was our Salvation. From the Tree came sin, and until the Tree sin lasted. In the evening, when the Lord walked in the Garden, they hid themselves; and in the evening the robber is brought by the Lord into Paradise. But some one will say to me, You are inventing subtleties; show me from some prophet the Wood of the Cross; unless you give me a testimony from a prophet, I will not be persuaded.
Hear then from Jeremias, and assure yourself; I was like a harmless lamb led to be slaughtered; did I not know it? (for in this manner read it as a question, as I have read it; for He who said, You know that after two days comes the passover, and the Son of Man is betrayed to be crucified, did He not know?) I was like a harmless lamb led to be slaughtered; did I not know it? (but what sort of lamb? Let John the Baptist interpret it, when he says, Behold the Lamb of God, that takes away the sin of the world.) They devised against Me a wicked device, saying — (He who knows the devices, knew He not the result of them?
And what said they?)— Come, and let us place a beam upon His bread — (and if the Lord reckon you worthy, you shall hereafter learn, that His body according to the Gospel bore the figure of bread;)— Come then, and let us place a beam upon His bread, and cut Him off out of the land of the living;— (life is not cut off, why do you labour for nought?)— And His name shall be remembered no more. Vain is your counsel; for before the sun His Name abides in the Church.
And that it was Life, which hung on the Cross, Moses says, weeping, And your life shall be hanging before your eyes; and you shall be afraid day and night, and you shall not trust your life. And so too, what was just now read as the text, Lord, who has believed our report?
Source: Catechetical Lectures (New Advent)