Can anything be imagined so ridiculous, that this miserable and wretched creature [man], who is not so much as master of himself, but subject to the injuries of all things, should call himself master and emperor of the world, of which he has not power to know the least part, much less to command the whole?

absurdity of the claims so arrogantly set up by the masters, over beings designed by God to be as free as kings; and at the perfect stupidity of the slave, in admitting for one moment the validity of these claims.

Nobody can spare themselves the waiting and most will be unable to bear this torment, but will throw themselves with greed back at men, things, and thoughts, whose slaves they will become from then on. Since then it will have been clearly proved that this man is incapable of enduring beyond things, men, and thoughts, and they will hence become his master and he will become their fool, since he cannot be without them, not until even his soul has become a fruitful field. Also he whose soul is a garden, needs things, men, and thoughts, but he is their friend and not their slave and fool.

Is there no life, but these alone?
Madman or slave, must man be one?

If, however, I liberate myself from my master – which is to say, from the emotions that make my master frightening – what troubles can I have? No man is my master any longer.

A man likes to believe that he is the master of his soul. But as long as he is unable to control his moods and emotions, or to be conscious of the myriad secret ways in which unconscious factors insinuate themselves into his arrangements and decisions, he is certainly not his own master.

" — I'm a slave to my emotions, to my likes, to my hatred of boredom, to most of my desires — —
"You are not!" She brought one little fist down onto the other. "You're a slave, a bound helpless slave to one thing in the world, your imagination.

He who is not master of his own thoughts is not accountable for his own deeds.

I need no master to punish me in order to behave as I ought. If I did, I would be no more than a child who obeys his father's rules only because he fears the whip, and not because he actually means good.

Reason is the slave of passion.

But when he comes in thunder and lightning brandishing these things, and I show fear in response, in effect I have been brought face to face with my master, just like a runaway slave.

I thought of the fate of Descartes’ famous formulation: man as ‘master and proprietor of nature.’ Having brought off miracles in science and technology, this ‘master and proprietor’ is suddenly realizing that he owns nothing and is master neither of nature (it is vanishing, little by little, from the planet), nor of History (it has escaped him), nor of himself (he is led by the irrational forces of his soul). But if God is gone and man is no longer master, then who is master? The planet is moving through the void without any master. There it is, the unbearable lightness of being.

For what is the self-complacent man but a slave to his own self-praise.

Unless a man is master of his soul all other kinds of mastery amount to little.