WIST

Good Master, how shall I recount this Thine inestimable charity?
What return can I make for this vast boon? [...]
What reward shall I give my God,
except my heart’s obedience to His command?
And Thy command is this:
that we love one another.

Anselm of Canterbury (1033-1109) British monk, theologian, archbishop, saint.
(Attributed)
From "A Prayer for Friends," in Prayers and Meditations of St. Anselm, selected and translated by a Religious of C.S.M.V. (1952)

Spare me through Your mercy, do not punish me through Your justice.

Anselm of Canterbury (1033-1109) British monk, theologian, archbishop, saint.
Proslogion

For I do not seek to understand in order to believe, but I believe in order to understand. For I believe this: unless I believe, I will not understand.

Anselm of Canterbury (1033-1109) British monk, theologian, archbishop, saint.
Proslogion, ch. 1 (c. 1077-1078)