On some positions, Cowardice asks the question, “Is it safe?” Expediency asks the question, “Is it is politic?” Vanity asks the question, “Is it is popular?” But Conscience asks the question, “Is it right?” There comes a time when one must take a position that is neither safe, nor politic, nor popular, but he must do it because Conscience tells him it is right.

Martin Luther King, Jr. (1929-1968) American clergyman, civil rights leader, social activist, preacher

Speech, Santa Rita, Calif., (14 Jan 1968)

Recording (at 10:22). King reused speech elements frequently. The same passage can be found in "Remaining Awake Through a Great Revolution", sermon at the National Cathedral, Washington, DC (31 Mar 1968).