Thinking is difficult, therefore let the herd pronounce judgment!

Carl Jung (1875-1961) Swiss psychologist

Flying Saucers: A Modern Myth of Things Seen in the Skies, ch. 2 (1959) [tr. Hull]
    (Source)

The motto of the "relatively unconscious man" who "clings to the commonplace, the obvious, the probable, the collectively valid." Reprinted in the The Collected Works of C.G. Jung - Civilization in Transition, vol. 10, ¶ 653.

Probable source of the frequently-attributed (but unfound) "Thinking is difficult. That's why most people judge."