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There is nothing more ancient than the truth.

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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.

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And thus, the actions of life often not allowing any delay, it is a truth very certain that, when it is not in our power to determine the most true op...more

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The dreams we imagine when we are asleep should not in any way make us doubt the truth of the thoughts we have when we are awake.

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It is only prudent never to place complete confidence in that by which we have even once been deceived.