Let nobody give you the impression that the problem of racial injustice will work itself out. Let nobody give you the impression that only time will solve the problem.
Source, in full
Somewhere we must come to see that human progress never rolls in on the wheels of inevitability. It comes through the tireless efforts and the persistent work of dedicated individuals who are willing to be co-workers with God. And without this hard work, time itself becomes an ally of the primitive forces of social stagnation. So we must help time and realize that the time is always ripe to do right.