Johann Wolfgang von Goethe Quote

Analogy has two errors to fear - the one when it contents itself with being serviceable to wit, in which case it floats away in futile sport; the other, when it shrouds itself in tropes and similes: this last is the less dangerous of the two.

In: John Stuart Blackie, The Wisdom of Goethe, Philosophy, Metaphysics, Logic, Truth and Science (p. 158)