Ignorance more frequently begets confidence than does knowledge.
It has often and confidently been asserted, that man's origin can never be known: but ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science».
Explanation:
«The Descent of Man» (1871), volume I, «Introduction», page 3.