Re-reading A Letter from a Birmingham Jail (April, 1963) provides a glimpse into the mindset on all sides of the segregation issue, and, as such is a pleasant, if quaint, reminder of how far we have come. I heard Dr. King preach at Harvard's Memorial Church in 1962--the theme was doing all work, any work, "to the glory of God"--and George Gilder and I were able to hear his great oration at the Lincoln Memorial, the summer of '63--"I Have a Dream."
But there are many useful quotations from King that tend to surprise. In a "Letter" his most serious concern is the indifference of people who should be on his side. I like this one from "Letter," about the "white moderate":
"Shallow understanding from people of good will is more frustrating than absolute misunderstanding from people of ill will."