All knowledge degenerates into probability.

The identity that we ascribe to things is only a fictitious one, established by the mind, not a peculiar nature belonging to what we’re talking about.

If morality had naturally no influence on human passions and actions, it were in vain to take such pains to inculcate it; and nothing would be more fruitless than that multitude of rules and precepts with which all moralists abound.

It's when we start working together that the real healing takes place... it's when we start spilling our sweat, and not our blood.

[The sceptic] must acknowledge, if he will acknowledge any thing, that all human life must perish, were his principles to prevail.All discourse, all action would immediately cease, and men remain in a total lethargy, till the necessities of nature, unsatisfied, put an end to their miserable existence.

The first ideas of religion arose, not from contemplation of the works of nature, but from a concern with regard to the events of life.

I never asserted such an absurd thing as that things arise without a cause.