What is life if a man cannot count on his friends when he has gone mad?

When men are imbeciles, the one who is mad dominates the others.

The man who would prefer great wealth or strength more than love, more than friends, is diseased of soul.

A man must be a little mad if he does not want to be even more stupid.

The most serious misfortune for a busy man who is overwhelmed by his possessions is, that he believes men to be his friends when he himself is not a friend to them, and that he deems his favours to be effective in winning friends, although, in the case of certain men, the more they owe, the more they hate.

No man has a wholly undiseased mind ... in one way or another all men are mad.

To say a man does mad things because he is mad is merely unintelligent and stupid. A madman is as logical and reasoned in his action as a sane man — given his peculiar biased point of view. For example, if a man insists on going out and squatting about in nothing but a loin cloth his conduct seems eccentric in the extreme. But once you know that the man himself is firmly convinced that he is Mahatma Gandhi, then his conduct becomes perfectly reasonable and logical.

All men are mad in some way or the other;

A foolish friend may cause more woe
Than could, indeed, the wisest foe.

He is not mad. He is only more clever than you. It is not the same.

A madman is not someone who has lost his reason but someone who has lost everything but his reason

To understand this for sense it is not required that a man should be a geometrician or a logician, but that he should be mad.

Men can be brilliant and strong, they whispered to one another. But men can be mad, as well. And the mad ones can ruin the world.

Men are so necessarily mad, that not to be mad would amount to another form of madness.