“Science investigates, religion interprets. Science gives man knowledge which is power, religion gives man wisdom which is control. Science deals mainly with facts, religion deals with values. The two are not rivals. They are complementary. Science keeps religion from sinking into the valley of crippling irrationalism and paralysing obscurantism. Religion prevents science from falling into the marsh of obsolete materialism and moral nihilism.”

“Everyone has the power for greatness, not for fame but greatness, because greatness is determined by service.”

“Todo hombre debe decidir si caminará a la luz del altruismo creativo o en la oscuridad del egoísmo destructivo. Éste es el juicio. La pregunta más urgente, e ineludible, de la vida es: ¿Qué estás haciendo por los demás?”

“Use me, God. Show me how to take who I am, who I want to be, and what I can do, and use it for a purpose greater than myself.”

“The day we see the truth and cease to speak is the day we begin to die”

“We must accept finite disappointment, but never lose infinite hope.”

“Something is happening in Memphis; something is happening in our world. And you know, if I were standing at the beginning of time, with the possibility of taking a kind of general and panoramic view of the whole of human history up to now, and the Almighty said to me, "Martin Luther King, which age would you like to live in?" I would take my mental flight by Egypt and I would watch God's children in their magnificent trek from the dark dungeons of Egypt through, or rather across the Red Sea, through the wilderness on toward the promised land. And in spite of its magnificence, I wouldn't stop there. I would move on by Greece and take my mind to Mount Olympus. And I would see Plato, Aristotle, Socrates, Euripides and Aristophanes assembled around the Parthenon. And I would watch them around the Parthenon as they discussed the great and eternal issues of reality. But I wouldn't stop there. I would go on, even to the great heyday of the Roman Empire. And I would see developments around there, through various emperors and leaders. But I wouldn't stop there. I would even come up to the day of the Renaissance, and get a quick picture of all that the Renaissance did for the cultural and aesthetic life of man. But I wouldn't stop there. I would even go by the way that the man for whom I am named had his habitat. And I would watch Martin Luther as he tacked his ninety-five theses on the door at the church of Wittenberg. But I wouldn't stop there. I would come on up even to 1863, and watch a vacillating President by the name of Abraham Lincoln finally come to the conclusion that he had to sign the Emancipation Proclamation. But I wouldn't stop there. I would even come up to the early thirties, and see a man grappling with the problems of the bankruptcy of his nation. And come with an eloquent cry that we have nothing to fear but "fear itself." But I wouldn't stop there.”

“The mere fact that we live in the United States means that we are caught in a network of inescapable mutuality. Therefore, no American can afford to be apathetic about the problem of racial justice. It is a problem that meets every man at his front door. The racial problem will be solved in America to the degree that every American considers himself personally confronted with it. Whether one lives in the heart of the Deep South or on the periphery of the North, the problem of injustice is his problem; it is his problem because it is America’s problem.”

“Injustice anywhere is injustice everywhere. Anyone who lives inside the US can never be considered an outsider anywhere in the country”

“I have consistently preached that nonviolence demands that the means we use must be as pure as the ends we seek.”

“But I know, somehow, that only when it is dark enough, can you see the stars.”

“Human progress never rolls in on the wheels of inevitability; it comes through the tireless efforts of [people] willing to be co-workers with God.”

“But I am also concerned about our moral uprightness and the health of our souls. Therefore I must oppose any attempt to gain our freedom by the methods of malice, hate, and violence that have characterized our oppressors. Hate is just as injurious to the hater as it is to the hated. Like an unchecked cancer, hate corrodes the personality and eats away its vital unity. Many of our inner conflicts are rooted in hate. This is why psychiatrists say, “Love or perish.” Hate is too great a burden to bear.”

“Our lives begin to end the day we become silent about things that matter.

“I refuse to accept the view that mankind is so tragically bound to the starless midnight of racism and war that the bright daybreak of peace and brotherhood can never become a reality... I believe that unarmed truth and unconditional love will have the final word.”