The individual always realizes only one of the possibilities in his development, which could always have taken a different turning whenever he had to make an important decision.

The existence of inherent limits of experience in no way settles the question about the subordination of facts of the human world to our knowledge of matter.

If there were a science of human beings it would be anthropology that aims at understanding the totality of experience through structural context.

Any theory intended to describe and analyze socio-historical reality cannot restrict itself to the human spirit and disregard the totality of human nature.

What man is, only his history tells.

A knowledge of the forces that rule society, of the causes that have produced its upheavals, and of society's resources for promoting healthy progress has become of vital concern to our civilization.

From the perspective of mere representation, the external world always remains only a phenomenon.