10 Most Powerful Quotes from Martin Luther King Jr.

"We will be able to hew out of the mountain of despair a stone of hope."

-From "I Have A Dream" speech

“One day we will learn that the heart can never be totally right when the head is totally wrong."

- From Strength to Love, 1963 book by Martin Luther King Jr.

“Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate, only love can do that.”

- Strength to Love

"The ultimate measure of a man is not where he stands in moments of convenience and comfort, but where he stands at times of challenge and controversy."

- Strength to Love

"If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”

-From 1963 Spellman College Address

"Let no man pull you so low as to hate him."

-From his 1956 "The Most Durable Power" sermon

"True peace is not merely the absence of tension; it is the presence of justice."

-From his 1957 book Stride Toward Freedom.

"Intelligence plus character—that is the goal of true education."

- From "The Purpose of Education," a 1947 article for Morehouse College's student newspaper

"Love is the greatest force in the universe. It is the heartbeat of the moral cosmos. He who loves is a participant in the being of God."

-From a rare handwritten letter he penned in the mid-1960s

"Whatever affects one directly, affects all indirectly."

-From his April 1963 "Letter from a Birmingham Jail."