None save great men have been the authors of great heresies.

The Devil often transforms himself into an angel to tempt men, some for their instruction, some for their ruin.

There is a God-shaped vacuum in every man that only Christ can fill.

When I seek you, my God, I seek a blessed life. I shall seek you, so that my soul may live.

I acknowledge Thee, Lord of heaven and earth, and praise Thee for my first rudiments of being, and my infancy, whereof I remember nothing; for Thou hast appointed that man should from others guess much as to himself; and believe much on the strength of weak females.

Narrow is the mansion of my soul; enlarge Thou it, that Thou mayest enter in. It is ruinous; repair Thou it. It has that within which must offend Thine eyes; I confess and know it. But who shall cleanse it? or to whom should I cry, save Thee? Lord, cleanse me from my secret faults, and spare Thy servant from the power of the enemy. I believe, and therefore do I speak.

What difference, if you are mistaken? For if I am mistaken, I am. For he who is not, assuredly cannot be mistaken; and therefore I am, if I am mistaken. Therefore because I am if I am mistaken, how am I mistaken that I am, when it is sure that I am, if I am mistaken.