The man of knowledge must be able not only to love his enemies but also to hate his friends.
Twofold misjudgement. - The misfortune suffered by clear-minded and easily understood writers is that they are taken for shallow and thus little effort is expended on reading them: and the good fortune that attends the obscure is that the reader toils at them and ascribes to them the pleasure he has in fact gained from his own zeal.
It is not the strength, but the duration, of great sentiments that makes great men.
A degree of culture, and assuredly a very high one, is attained when man rises above superstitions and religious notions and fears, and, for instance, no longer believes in guardian angels or in original sin, and has also ceased to talk of the salvation of his soul.
one does not only wish to be understood when one writes; one wishes just as surely not to be understood.
It is my ambition to say in ten sentences what others say in a whole book.