G. K. Chesterton

The artistic temperament is a disease that afflicts amateurs. It is a disease which arises from men not having sufficient power of expression to utter and get rid of the element of art in their being. Artists of a large and wholesome vitality get rid of their art easily, as they breathe easily, or perspire easily. But in artists of less force, the thing becomes a pressure, and produces a definite pain, which is called the artistic temperament. Thus, very great artists are able to be ordinary men—men like Shakespeare or Browning.