In order to improve the mind, we ought less to learn, than to contemplate.
The first precept was never to accept a thing as true until I knew it as such without a single doubt.
An optimist may see a light where there is none, but why must the pessimist always run to blow it out?
Illusory joy is often worth more than genuine sorrow.
The greatest minds are capable of the greatest vices as well as of the greatest virtues.
The reading of all good books is like a conversation with the finest minds of past centuries.
Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.
If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
I think; therefore I am.
It is not enough to have a good mind; the main thing is to use it well.
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