We are called to speak for the weak, for the voiceless, for the victims of our nation and for those it calls "enemy," for no document from human hands can make these humans any less our brothers [...] I have tried in these last few minutes to give a voice to the voiceless in Vietnam and to understand the arguments of those who are called "enemy" [...] Somehow this madness must cease. We must stop now. I speak as a child of God and brother to the suffering poor of Vietnam. I speak for those whose land is being laid waste, whose homes are being destroyed, whose culture is being subverted. I speak of the — for the poor of America who are paying the double price of smashed hopes at home, and death and corruption in Vietnam.
Note: Rev. King was paraphrasing the Book of Proverbs 31:8-10 when referring to "speak out for the voiceless" and the rights of people who need justice. - Beyond Vietnam: A Time to Break Silence (1967)