I am aware that many object to the severity of my language, but is there not cause for severity? I will be as harsh as truth, and as uncompromising as justice. On this subject, I do not wish to think, or speak, or write in moderation. No! No! Tell a man whose house is on fire, to give a moderate alarm; tell him to moderately rescue his wife from the hands of the ravisher; tell the mother to gradually extricate her babe from the fire into which it has fallen — but urge me not to use moderation in a cause like the present. I am in earnest — I will not equivocate — I will not excuse — I will not retreat a single inch; and I will be heard.

William Lloyd Garrison (1805-1879) American abolitionist, journalist, suffragist, social reformer
The Liberator, #1 (1 Jan 1831)

On slavery.