Vanity of science. Knowledge of physical science will not console me for ignorance of morality in time of affliction, but knowledge of morality will always console me for ignorance of physical science.

If it is an extraordinary blindness to live without investigating what we are, it is a terrible one to live an evil life, while believing in God

Those honor nature well, who teach that she can speak on everything...

Reason commands us far more imperiously than a master; for in disobeying the one we are unfortunate, and in disobeying the other we are fools.

If you believe in God you are at no disadvantage in this life, and at considerable advantage in the next. If you do not believe, but find in the next that there was a next, you are most unfortunate!

Our imagination so magnifies this present existence, by the power of continual reflection on it, and so attenuates eternity, by not thinking of it at all, that we reduce an eternity to nothingness, and expand a mere nothing to an eternity; and this habit is so inveterately rooted in us that all the force of reason cannot induce us to lay it aside.

Contradiction is not a sign of falsity, nor the lack of contradiction a sign of truth.