Do not weep; do not wax indignant. Understand.
Let unswerving integrity be your watchword.
True virtue is life under the direction of reason.
Those who know the true use of money, and regulate the measure of wealth according to their needs, live contented with few things.
Sadness diminishes a man's powers
The endeavor to understand is the first and only basis of virtue.
Be not astonished at new ideas; for it is well known to you that a thing does not therefore cease to be true because it is not accepted by many.
We must take care not to admit as true anything, which is only probable. For when one falsity has been let in, infinite others follow.
We feel and know that we are eternal.
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.
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.
He who wishes to revenge injuries by reciprocal hatred will live in misery. But he who endeavors to drive away hatred by means of love, fights with pleasure and confidence; he resists equally one or many men, and scarcely needs at all the help of fortune. Those whom he conquers yield joyfully
Indulge yourself in pleasures only in so far as they are necessary for the preservation of health.
Philosophy has no end in view save truth; faith looks for nothing but obedience and piety.
[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.
Everything excellent is as difficult as it is rare.
Further conceive, I beg, that a stone, while continuing in motion, should be capable of thinking and knowing, that it is endeavoring, as far as it can, to continue to move. Such a stone, being conscious merely of its own endeavor and not at all indifferent, would believe itself to be completely free, and would think that it continued in motion solely because of its own wish. This is that human freedom, which all boast that they possess, and which consists solely in the fact, that men are conscious of their own desire, but are ignorant of the causes whereby that desire has been determined.
Those who are believed to be most abject and humble are usually most ambitious and envious.
He, who knows how to distinguish between true and false, must have an adequate idea of true and false.
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.
He who loves God cannot endeavor that God should love him in return.
Superstition, then, is engendered, preserved, and fostered by fear.
Happiness is a virtue, not its reward.
What everyone wants from life is continuous and genuine happiness.
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