Indulge yourself in pleasures only in so far as they are necessary for the preservation of health.
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.
Whatsoever is contrary to nature is contrary to reason, and whatsoever is contrary to reason is absurd.
Freedom is self-determination.
Those who are believed to be most abject and humble are usually most ambitious and envious.
Philosophy has no end in view save truth; faith looks for nothing but obedience and piety.
Let unswerving integrity be your watchword.
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.
I have made a ceaseless effort not to ridicule, not to bewail, not to scorn human actions, but to understand them.
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.
Happiness is a virtue, not its reward.
Do not weep; do not wax indignant. Understand.
What everyone wants from life is continuous and genuine happiness.
I saw that all things I feared, and which feared me, had nothing good or bad in them save insofar as the mind was affected by them.
Superstition, then, is engendered, preserved, and fostered by fear.
Nature has no goal in view, and final causes are only human imaginings.
Hatred is increased by being reciprocated, and can on the other hand be destroyed by love.
Sadness diminishes a man's powers
He who regulates everything by laws, is more likely to arouse vices than reform them.
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.
Everything excellent is as difficult as it is rare.
[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.
To understand something is to be delivered of it.
He, who knows how to distinguish between true and false, must have an adequate idea of true and false.
Big fish eat small fish with as much right as they have power.
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