Hard conditions of life are indispensable to bringing out the best in human personality.

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.

One must train oneself, by small and frequent efforts, to dominate one's feelings.

To accomplish our destiny it is not enough to merely guard prudently against road accidents. We must also cover before nightfall the distance assigned to each of us.

Comforts and syphilis are the greatest enemies of mankind.

All of us, at certain moments of our lives, need to take advice and to receive help from other people.

The modern city consists of...dark, narrow streets full of gasoline fumes, coal dust, and toxic gasses, torn by the noise.