Great words from a great man against the great injustice of slavery.
Let us not despair; it is a blessed cause, and success, ere long, will crown our exertions. Already we have gained one victory; we have obtained, for these poor creatures, the recognition of their human nature, which, for a while was most shamefully denied. This is the first fruits of our efforts; let us persevere and our triumph will be complete. Never, never will we desist till we have wiped away this scandal from the Christian name, released ourselves from the load of guilt, under which we at present labour, and extinguished every trace of this bloody traffic, of which our posterity, looking back to the history of these enlightened times, will scarce believe that it has been suffered to exist so long a disgrace and dishonour to this country.
speech before the House of Commons, 18 April 1791