If one wanted to crush and destroy a man entirely, to mete out to him the most terrible punishment, all one would have to do would be to make him do work that was completely and utterly devoid of usefulness and meaning.

If God does not exist, then everything is permissible.

I used to analyze myself down to the last thread, used to compare myself with others, recalled all the smallest glances, smiles and words of those to whom I’d tried to be frank, interpreted everything in a bad light, laughed viciously at my attempts ‘to be like the rest’ –and suddenly, in the midst of my laughing, I’d give way to sadness, fall into ludicrous despondency and once again start the whole process all over again – in short, I went round and round like a squirrel on a wheel.

You know, my boy, he said, it's impossible to love men such as they are. And yet we must. So try to do good to men by doing violence to your feelings, holding your nose, and shutting your eyes, especially shutting your eyes. Endure their villainy without anger, as much as possible; try to remember that you're a man too. For, if you're even a little above average intelligence, you'll have the propensity to judge people severely. Men are vile by nature and they'd rather love out of fear. Don't give in to such love: despise it always.

Love animals: God has given them the rudiments of thought and joy untroubled. Do not trouble their joy, don't harrass them, don't deprive them of their happiness, don't work against God's intent. Man, do not pride yourself on superiority to animals; they are without sin, and you, with your greatness, defile the earth by your appearance on it, and leave the traces of your foulness after you - alas, it is true of almost every one of us!

Luxuries are easy to take up but very difficult to give up

One can fall in love and still hate.