Nothing exists from whose nature some effect does not follow.
One and the same thing can at the same time be good, bad, and indifferent, e.g., music is good to the melancholy, bad to those who mourn, and neither good nor bad to the deaf.
All mankind… being all equal and independent, no one ought to harm another in his life, health, liberty or possessions.
A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else.
One unerring mark of the love of truth is not entertaining any proposition with greater assurance than the proofs it is built upon will warrant.
Our deeds disguise us. People need endless time to try on their deeds, until each knows the proper deeds for him to do. But every day, every hour, rushes by. There is no time.
I call him free who is led solely by reason.
Whatsoever is, is in God, and without God nothing can be, or be conceived.
Freedom is absolutely necessary for the progress in science and the liberal arts.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.