Hegel tells us that to him who looks upon the world rationally, the world presents itself as a rational process. Whatever the human mind contemplates, be it space, time, matter, motion, force, life, thought, and so on, it perceives that thought and reason pervade the whole of existence; that all realities and processes in existence live, move and have their being in thought and reason. Thought and reason are the substance and essence of existence; and this is so, because God, who manifests himself as existence, is a conscious, thinking and rational being. That most men do not perceive the rationality of existence, this is not surprising. Everything is measured by itself: length is measured by length, weight is measured by weight, color is measured by color, and reason is measured by reason. Most men have not yet attained to reason. That they seem to be rational, this is due to the fact that men that had attained to reason created a wonderful world, and in this world even men who had not yet attained to reason can live more or less rationally; and thus appear more or less rational. But, in fact, they are not rational. This painfully manifests itself when they have to decide on any course of conduct. So long as they follow the methods already crystallized by rational persons, so long even the ordinary men appear to be rational. But, when they have to decide upon a course of conduct that was not already determined for them by science, religion and philosophy, they invariably act irrationally. Is it any wonder that they cannot perceive thought and reason in existence ? And even scientists are limited in their perception of the rationality of existence, just because science itself is limited. It requires the height and universality of philosophy to perceive that all existence lives, moves and has its being in thought and in reason. Every one according to the degree that he attained to reason, to that extent does he perceive the rationality of existence.