Good fantasy (and science fiction) correct an imbalance which exists in most realistic fiction. A man named Pelz (if memory serves) once wrote, ‘Beauty is controlled passion. Passion without control is destructive. Control without passion is dead.’ This is the essential paradox of what Blake called ‘reason’ and ‘energy‘: ‘Reason is the circumference of energy.’ Neither means anything without the other. Well, to put Blake in my terms, ‘Intellect is the circumference of imagination.’ I believe that most realistic fiction these days has lost its potential beauty by sacrificing imagination to intellect. Control crushes passion; reason squeezes out energy. In good fantasy and science fiction, the imagination regains its crucial, energizing role. The result is the single most human thing in the world: beauty. (This is the argument from conviction.) My intellectual grad school friends used to denounce Lord of the Rings because it had no relevance to the ‘real world’. They were wrong. LOTR is intensely relevant to the human heart because LOTR is beautiful. I believe that the ‘escape’ into fantasy is an escape from materialism, dead intellect, and cynicism into humanity.
However, to avoid being misunderstood, I should go on to say that people who sacrifice intellect to imagination are making the same mistake which is killing realistic fiction. ‘Passion without control is destructive.’ The person who uses fantasy to avoid dealing with reality is in as much trouble as the person who uses intellect tou avoid confronting the inner dragons.
—Stephen R. Donaldson, interviewed in Fantasy Crossroads (1979)