Unaware of the absurdity of it, we introduce our own petty household rules into the economy of the universe for which the life of generations, peoples, of entire planets, has no importance in relation to the general development.

It seems to me that you are solving a problem which goes beyond the limits of physiology in too simple a way. Physiology has realized its problem with fortitude, breaking man down into endless actions and counteractions and reducing him to a crossing, a vortex of reflex acts. Let it now permit sociology to restore him as a whole. Sociology will wrest man from the anatomical theatre and return him to history.

Human development is a form of chronological unfairness, since late-comers are able to profit by the labors of their predecessors without paying the same price.

Science, which cuts its way through the muddy pond of daily life without mingling with it, casts its wealth to right and left, but the puny boatmen do not know how to fish for it.

[T]he departing world leaves behind... not an heir, but a pregnant widow.

I am truly horrified by modern man. Such absence of feeling, such narrowness of outlook, such lack of passion and information, such feebleness of thought.

Compassionate love may be strong. It sobs, it burns, then it wipes away its tears – and it does nothing.