Let us believe that the whole of truth can never do harm to the whole of virtue. Trust it. And remember, that, in order to get the whole of truth, you must allow every man, right or wrong, freely to utter his conscience, and protect him in so doing.

Wendell Phillips (1811-1884) American abolitionist, orator, social activist

“The Boston Mob,” speech, Antislavery Meeting, Boston (21 Oct 1855)
    (Source)

"On the Twentieth Anniversary of the Mob of October 21, 1835."