Below are four excerpts of “Letter from Birmingham Jail.” Find the full letter online here.

ON WHY "WE CAN'T WAIT":  “But when you have seen vicious mobs lynch your mothers and fathers at will and drown your sisters and brothers at whim; when you have seen hate-filled policemen curse, kick, brutalize, and even kill your black brothers and sisters with impunity; when you see the vast majority of your twenty million Negro brothers smothering in an airtight cage of poverty in the midst of an affluent society; when you suddenly find your tongue twisted and your speech stammering as you seek to explain to your six-year-old daughter why she cannot go to the public amusement park that has just been advertised on television, and see tears welling up in her little eyes when she is told that Funtown is closed to colored children, and see the depressing clouds of inferiority begin to form in her little mental sky, and see her begin to distort her little personality by unconsciously developing a bitterness toward white people; when you have to concoct an answer for a five-year-old son asking in agonizing pathos, "Daddy, why do white people treat colored people so mean?"; when you take a cross-country drive and find it necessary to sleep night after night in the uncomfortable corners of your automobile because no motel will accept you; when you are humiliated day in and day out by nagging signs reading "white" and "colored"; when your first name becomes "nigger" and your middle name becomes "boy" (however old you are) and your last name becomes "John," and when your wife and mother are never given the respected title "Mrs."; when you are harried by day and haunted by night by the fact that you are a Negro, living constantly at tiptoe stance, never knowing what to expect next, and plagued with inner fears and outer resentments; when you are forever fighting a degenerating sense of "nobodyness" -- then you will understand why we find it difficult to wait.”

ON BREAKING UNJUST LAWS: "An unjust law is a human law that is not rooted in eternal and natural law. Any law that uplifts human personality is just. Any law that degrades human personality is unjust. All segregation statutes are unjust because segregation distorts the soul and damages the personality. It gives the segregator a false sense of superiority and the segregated a false sense of inferiority.'"

ON TIME AND HISTORY: "Actually, time is neutral. It can be used either destructively or constructively. I am coming to feel that the people of ill will have used time much more effectively than the people of good will. We will have to repent in this generation not merely for the vitriolic words and actions of the bad people but for the appalling silence of the good people. We must come to see that human progress never rolls in on wheels of inevitability. It comes through the tireless efforts and persistent work of men willing to be coworkers with God, and without this hard work time itself becomes an ally of the forces of social stagnation."

ON HEROES: "One day the South will recognize its real heroes. They will be the James Merediths, courageously and with a majestic sense of purpose facing jeering and hostile mobs and the agonizing loneliness that characterizes the life of the pioneer. They will be old, oppressed, battered Negro women, symbolized in a seventy-two-year-old woman of Montgomery, Alabama, who rose up with a sense of dignity and with her people decided not to ride the segregated buses, and responded to one who inquired about her tiredness with ungrammatical profundity, "My feets is tired, but my soul is rested." They will be young high school and college students, young ministers of the gospel and a host of their elders courageously and nonviolently sitting in at lunch counters and willingly going to jail for conscience's sake. One day the South will know that when these disinherited children of God sat down at lunch counters they were in reality standing up for the best in the American dream and the most sacred values in our Judeo-Christian heritage.”