philosophical doctrine
philosophical theory

Throughout history, gratitude has been given a central position in religious and philosophical theories.

Sometimes a philosophical theory by itself can be stated quite briefly.

We'll also explore spiritual, philosophical and scientific theories for why they happen.

To know this he suggested makes a "vital part in a philosophical theory."

A discussion of the political, legal and philosophical theories that underlie the Constitution.

Perhaps these compromises are what one should expect, given the philosophical theory set out at the beginning of the book.

O: Do you consciously write to meet philosophical theories you've read?

Among the questions to be addressed by a philosophical theory of everything are: "Why is reality understandable?"

They must study philosophical and political theories, adapting them to modern society.

He was also much interested in philosophical theories of art.