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.
Joseph Alexander Leighton (1919). “The field of philosophy: an outline of lectures on introduction to philosophy”