The chief cause of ...

The chief cause of unhappiness in married life is that people think that marriage is sex attraction, which takes the form of promises and hopes and happiness - a view supported by public opinion and by literature. But marriage cannot cause happiness. Instead, it is always torture, which man has to pay for satisfying his sex urge.
The chief cause of unhappiness in married life is that people think that marriage is sex attraction, which takes the form of promises and hopes and happiness - a view supported by public opinion and by literature. But marriage cannot cause happiness. Instead, it is always torture, which man has to pay for satisfying his sex urge.

Quotes from the same author

Everyone thinks of changing the world, but no one thinks of changing himself.
We lost because we told ourselves we lost.
The two most powerful warriors are patience and time.
The strongest of all warriors are these two — Time and Patience.
The life of our class, of the wealthy and the learned, was not only repulsive to me but had lost all meaning. The sum of our action and thinking, of our science and art, all of it struck me as the overindulgences of a spoiled child.