The most common of all follies is to believe passionately in the palpably not true. It is the chief occupation of mankind.
H. L. Mencken

He also once stated:

A poet more than thirty years old is simply an overgrown child.

'Henry Louis Mencken (September 12, 1880 – January 29, 1956), better known as H. L. Mencken, was a twentieth-century journalist, satirist, social critic, cynic, and freethinker, known as the "Sage of Baltimore" and the "American Nietzsche". He is often regarded as one of the most influential American writers of the early 20th century.' Wikipedia.