Augustine of Hippo

"If I am mistaken, then I exist."

"Love, and do what you will."

"Miracles do not contradict nature, they only contradict what we know about nature."

"Lord, make me chaste, but not yet."

"All knowledge is good."

"The world is like a book, and those who do not travel read only one page."

"God is closer to us than we are to ourselves."

"Do not fear making mistakes—fear persisting in them."

"Life is happy not when a person has much of what he loves, but when he loves what he has."