La Rochefoucauld §laroch_271: Youth is a continual intoxication; it is the fever of reason.

Youth is a continual intoxication; it is the fever of reason. ["The best of life is but intoxication."--{Lord Byron, } Don Juan{, Canto II, stanza 179}. In the 1st Edition, 1665, the maxim finishes with--"it is the fever of health, the folly of reason."]