Human progress is not an uninterrupted march forward. It is a slow and devious movement with haltings and twistings. The pathway of man ascends and descends, wanders off into mazes. At times the trail seems to lose itself in the wilderness of human passion and folly. But inch by inch it goes forward with halting steps.

Science ... is organized common sense.

Skepticism literally means a thoughtful inquiry, the looking at a problem in a disinterested spirit, the surveying of a question from many sides. In this sense it is the very essence of philosophy and science.

Death is not regarded as a natural affair by primitive man. Death is believed to be due to the intervention of some malevolent or at least not well disposed power. Normally it should not take place. So we have all through history crude explanations of death, as e.g., the influence of the serpent, the devil, sin.

If the spiritual values of human existence at its highest term of development and achievement do not endure, amidst all the changes and chances of this mortal universe, there seems to be no stable or coherent meaning in existence. Then the universe is irrational--indeed it is no universe at all.

This is the very heart of true morality--not to struggle, not to fight with any weapons, for one's self alone--but to struggle and to fight for the common interest, to wield the power of brain and good right arm if need be for one's family, for the ordered community of life, for the state, for moral principles, humanity, and the common good.

The more serious poetry of the race has a philosophical structure of thought. It contains beliefs and conceptions in regard to the nature of man and the universe, God and the soul, fate and providence, suffering, evil and destiny. Great poetry always has, like the higher religion, a metaphysical content. It deals with the same august issues, experiences and conceptions as metaphysics or first philosophy.