Happiness is a virtue, not its reward.
Those who are believed to be most abject and humble are usually most ambitious and envious.
Superstition, then, is engendered, preserved, and fostered by fear.
Let unswerving integrity be your watchword.
What everyone wants from life is continuous and genuine happiness.
Hatred is increased by being reciprocated, and can on the other hand be destroyed by love.
Whatsoever is contrary to nature is contrary to reason, and whatsoever is contrary to reason is absurd.
Laws which prescribe what everyone must believe, and forbid men to say or write anything against this or that opinion, are often passed to gratify, or rather to appease the anger of those who cannot abide independent minds.
Sadness diminishes a man's powers
Philosophy has no end in view save truth; faith looks for nothing but obedience and piety.
He, who knows how to distinguish between true and false, must have an adequate idea of true and false.
To give aid to every poor man is far beyond the reach and power of every man. Care of the poor is incumbent on society as a whole.
Nature has no goal in view, and final causes are only human imaginings.
In the mind there is no absolute or free will; but the mind is determined to wish this or that by a cause, which has also been determined by another cause, and this last by another cause, and so on to infinity.
I have made a ceaseless effort not to ridicule, not to bewail, not to scorn human actions, but to understand them.
[Believers] are but triflers who, when they cannot explain a thing, run back to the will of God; this is, truly, a ridiculous way of expressing ignorance.
He who loves God cannot endeavor that God should love him in return.
I believe that a triangle, if it could speak, would say that God is eminently triangular, and a circle that the divine nature is eminently circular; and thus would every one ascribe his own attributes to God.
Do not weep; do not wax indignant. Understand.
We feel and know that we are eternal.
Men who are ruled by reason desire nothing for themselves which they would not wish for all mankind.
Everything excellent is as difficult as it is rare.
Freedom is self-determination.
Academies that are founded at public expense are instituted not so much to cultivate men's natural abilities as to restrain them.
To understand something is to be delivered of it.
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