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.
Every man is indeed bound to do what he can to promote the good of others, and a man who is of no use to anyone is strictly worthless.
I am thing that thinks: that is, a things that doubts,affirms, denies, understands a few things, is ignorant of many things, is willing, is unwilling, and also which imagines and has sensory perceptions.
And I shall always hold myself more obliged to those by whose favour I enjoy uninterrupted leisure than to any who might offer me the most honourable positions in the world.
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