In its use of words poetry is just the reverse of science. Very definite thoughts do occur, but not because the words are so chosen as logically to bar out all possibilities save one. No. But because the manner, the tone of voice, the cadence and rhythm play upon our interests and make them pick out from among an indefinite number of possibilities the precise particular thought which they need. That is why poetical descriptions often seem so much more accurate than prose descriptions. Language logically and scientifically used cannot describe a landscape or a face. To do so would need a prodigious apparatus of names for shades and nuances, for precise particular qualities. These names do not exist, so other means have to be used.