"The life of man is a perpetual flux of motion. All his thoughts, sentiments, and actions are in a continual succession, and never remain for any considerable time in the same state."

"Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them."

"terror is the primary principle of religion."

"To be a philosophical sceptic is the first and most essential step towards being a sound, believing Christian."

"Truth is disputable; not taste: what exists in the nature of things is the standard of our judgement; what has a reference to sentiment or feeling, can have no other standard than the sentiment or fee…"