Egoism , which is the moving ...

Egoism , which is the moving force of the world, and altruism , which is its morality , these two contradictory instincts , of which one is so plain and the other so mysterious, cannot serve us unless in the incomprehensible alliance of their irreconcilable antagonism.
Egoism , which is the moving force of the world, and altruism , which is its morality , these two contradictory instincts , of which one is so plain and the other so mysterious, cannot serve us unless in the incomprehensible alliance of their irreconcilable antagonism.

Quotes from the same author

It is when we try to grapple with another man's intimate need that we perceive how incomprehensible, wavering, and misty are the beings that share with us the sight of the stars and the warmth of the sun.
Necessity, they say, is mother of invention, but fear, too, is not barren of ingenious suggestions.
We looked at the venerable stream not in the vivid flush of a short day that comes and departs forever, but in the august light of abiding memories.
The way of even the most jusitifiable revolution is prepared by personal impulses disguised into creeds.
Some great men owe most of their greatness to the ability of detecting in those they destine for their tools the exact quality of strength that matters for their work.