Nothing exists without a cause, the original cause of this universe we call God.

I do not think a philosopher who would apply himself so earnestly to the explaining the ultimate principles of the soul, would show himself a great master in the very science of human nature, which he pretends to explain, or very knowing in what is naturally satisfactory to the mind of man.

Any person seasoned with a just sense of the imperfections of natural reason, will fly to revealed truth with the greatest avidity.

The whole [of religion] is a riddle, an ænigma, an inexplicable mystery. Doubt, uncertainty, suspence of judgment appear the onlyresult of our most accurate scrutiny, concerning this subject.

If ... the past may be no Rule for the future, all Experience becomes useless and can give rise to no Inferences or Conclusions.

Habit may lead us to belief and expectation but not to the knowledge, and still less to the understanding, of lawful relations.

Of all sciences there is none where first appearances are more deceitful than in politics.