The search for God is indeed, an entirely personal undertaking.... the most audacious adventure that one can dare.

Logic never attracts men to the point of carrying them away.

As to virtue . . . it is an act of the will, a habit which increases the quantity, intensity and quality of life. It builds up, strengthens and vivifies personality.

The most efficient way to live reasonably is every morning to make a plan of one's day and every night to examine the results obtained.

It seems that the increased number of scientific workers, their being split up into groups whose studies are limited to a small subject, and over-specialization have brought about a shrinking of intelligence. There is no doubt that the quality of any human group decreases when the number of the individuals composing this group increases beyond certain limits... The best way to increase the intelligence of scientists would be to decrease their number.

Discipline brings us effort, sacrifice and suffering. Later it brings us something of an inestimable value: something of which those who live only for pleasure, profit or amusement will always be deprived. This peculiar indefinable joy which one must have felt oneself to understand is the sign with which life marks its moment of triumph.

Intelligence is almost useless to the person whose only quality it is.