Everyone who observes himself doubting observes a truth, and about that which he observes he is certain; therefore he is certain about a truth. Everyone therefore who doubts whether truth exists has in himself a truth on which not to doubt.... Hence one who can doubt at all ought not to doubt the existence of truth.

We who preach and write, do so in a manner different from which the Scriptures have been written. We write while we make progress.We learn something new every day. We speak as we still knock for understanding...If anyone criticizes me when I have said what is right, he does me an injustice. But I would be more angry with the one who praises me and takes what I have written for Gospel truth than I would be with the one who criticizes me unfairly.

Fasting cleanses the soul, raises the mind, subjects one’s flesh to the spirit, renders the heart contrite and humble, scatters the clouds of concupiscence, quenches the fire of lust, and kindles the true light of chastity.

Humility is the foundation of all the other virtues hence, in the soul in which this virtue does not exist there cannot be any other virtue except in mere appearance.

God had one son on earth without sin, but never one without suffering.

Men go forth to wonder at the height of mountains, the huge waves of the sea, the broad flow of the ocean, the course of the stars-and forget to wonder at themselves. Beware of despairing about yourself: you are commanded to put your trust in God, and not in yourself.

How high a price we pay for the burden of habit! I am fitted for life here where I do not want to be, I want to live there but am unfit for it, and on both counts I am miserable.