Shared joys make a friend, not shared sufferings.

But the worst enemy you can meet will always be yourself; you lie in wait for yourself in caverns and forests. Lonely one, you are going the way to yourself! And your way goes past yourself, and past your seven devils! You will be a heretic to yourself and witch and soothsayer and fool and doubter and unholy one and villain. You must be ready to burn yourself in your own flame: how could you become new, if you had not first become ashes?

All truths are bloody truths to me.

To do great things is difficult; but to command great things is more difficult.

A man of genius is unbearable, unless he possesses at least two things besides: gratitude and purity.

A strong and well-constituted man digests his experiences (deeds and misdeeds all included) just as he digests his meats, even when he has some tough morsels to swallow.

That little hypocrites and half-crazed people dare to imagine that on their account the laws of nature are constantly broken; such an enhancement of every kind of selfishness to infinity, to impudence, cannot be branded with sufficient contempt. And yet Christianity owes its triumph to this pitiable flattery of personal vanity.