"Do not weep; do not wax indignant. Understand."

"Every man exists by the highest right of nature, and consequently, by the highest natural right, he does whatever follows from the necessity of his own nature."

"The human mind cannot be absolutely destroyed with the body, but something of it remains which is eternal."

"I call a thing free which exists and acts by the sole necessity of its own nature; and I call that compelled which is determined by something else to exist and act in a fixed and determinate manner."

"The highest good of the mind is the knowledge of God, and the highest virtue of the mind is to know God."