For art to exist, for any sort of aesthetic activity or perception to exist,
a certain physiological precondition is indispensable: intoxication.
It is a secret which every intellectual man quickly learns, that beyond the energy of his possessed and conscious intellect, he is capable of a new energy (as of an intellect doubled on itself ), by abandonment to the nature of things; that, beside his privacy of power as an individual man, there is a great public power on which he can draw by unlocking, at all risks, his human doors and suffering the ethereal tides to roll and circulate through him: then he is caught up into the life of the universe; his speech is thunder; his thought is law, and his words are universally intelligible as the plants and animals. The poet knows that he speaks adequately, then, only when he speaks somewhat wildly, or, “with the flower of the mind”; not with the intellect used as an organ but with the intellect released from all service…inebriated by nectar. As the traveler who has lost his way throws his reins on his horse’s neck and trusts to the instinct of the animal to find his road, so must we do with the divine animal who carries us through this world. For if in any manner we can stimulate this instinct, new passages are opened for us into nature, the mind flows into and through things hardest and highest, and the metamorphosis is possible. This is the reason why bards love wine, mead, narcotics, coffee, tea, opium, the fumes of sandalwood and tobacco, or whatever other species of animal exhilaration. All men avail themselves of such means as they can to add this extraordinary power to their normal powers, and to this end they prize conversation, music, pictures, sculpture, dancing, theaters, traveling, wars, mobs, fires, gaming, politics, or love, or science, or animal intoxication, which are several coarser or finer quasi-mechanical substitutes for the true nectar, which is the ravishment of the intellect by coming nearer to the fact.
–Ralph Waldo Emerson, from his essay "The Poet"