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

Humans are amphibians...half spirit and half animal...as spirits they belong to the eternal world, but as animals they inhabit time. This means that while their spirit can be directed to an eternal object, their bodies, passions, and imaginations are in continual change, for to be in time, means to change. Their nearest approach to constancy, therefore, is undulation--the repeated return to a level from which they repeatedly fall back, a series of troughs and peaks.

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

What is government itself but the greatest of all reflections on human nature?

Surefire things are deadening to the human spirit.

The problem in this world is that we have poetry but insist on living in prose.