Apollo and Dionysus
Apollo and Dionysus are two greek gods commonly compared and contrasted in the field of philosophy. Apollo is the beautiful sun god who lives in a world of illusions. Dionysus is the god of wine who forces man to confront ugly spectacles.
Leontius, an ancient greek, did not want to look at the bodies of executed criminals but then forced himself to.
These ideas were expounded on in ancient greek tragedies.
Nietzsche, a 19th century German philosopher, was particularly interested in the Apollonian and Dionysian dichotomy.