Growing old is like being increasingly penalized for a crime you haven't committed.

Not everything is immediately good to those who seek God; but everything is capable of becoming good.

The only way forward is in the direction of a common passion, for nothing in the universe can ultimately resist the cumulative ardor of the collective soul.

A universal love is not only psychologically possible; it is the only complete and final way in which we are able to love.

This fundamental discovery that all bodies owe their origin to arrangements of single initial corpuscular type is the beacon that lights the history of the universe to our eyes. In its own way, matter obeyed from the beginning that great law of biology to which we shall have to recur time and time again, the law of "complexification."

The future is in the hands of those who can give tomorrow's generations valid reasons to live and hope.

The phrase 'Sense of the Earth' should be understood to mean the passionate concern for our common destiny which draws the thinking part of life ever further onward. The only truly natural and real human unity is the spirit of the Earth. . . .The sense of Earth is the irresistable pressure which will come at the right moment to unite them (humankind) in a common passion.The Age of Nations is past. The task before us now, if we would not perish, is to build the Earth.