in all cultures, human beings - in order to be human - must understand the nonhuman.

The negative cautions of science are never popular. If the experimentalist would not commit himself, the social philosopher, the preacher, and the pedagogue tried the harder to give a short-cut answer.

In each age there is a series of pressing questions which must be asked and answered. On the correctness of the questions depends the survival of those who ask; on the quality of the answers depends the quality of the life those survivors will lead.

All social change comes from the passion of individuals.

My grandmother wanted me to get a good education, so she kept me as far away from schools as possible.

In the presence of grandparent and grandchild, past and future merge in the present.

I devoutly believe that there is no difficulty between two people for which both are not responsible.