How do we love our enemies?

The quote below, according to Class of Nonviolence - Lesson Four - Essay 2, is from a sermon delivered at the Dexter Avenue Baptist Church in Montgomery, Alabama, at Christmas, 1957.

Dr. Martin Luther King Jr.: To our most bitter opponents we say: "We shall match your capacity to inflict suffering by our capacity to endure suffering. We shall meet your physical force with soul force. Do to us what you will, and we shall continue to love you. We cannot in all good conscience obey your unjust laws because noncooperation with evil is as much a moral obligation as is cooperation with good. Throw us in jail and we shall still love you. Bomb our homes and threaten our children, and we shall still love you. Send your hooded perpetrators of violence into our community at the midnight hour and beat us and leave us half dead, and we shall still love you. But be ye assured that we will wear you down by our capacity to suffer. One day we shall win freedom but not only for ourselves. We shall so appeal to your heart and conscience that we shall win you in the process and our victory will be a double victory."

The quote above has been reported to be found in King's sermon titled “Loving Your Enemies,” delivered at Dexter Avenue Baptist Church on Nov. 17, 1957, but I haven't been able to confirm this, possibly because the recording from which the sermon was transcribed was "interrupted." Nevertheless, the sermon is worth reading.

A similar quote is found in King's address titled “Some Things We Must Do,” which was delivered at the 2nd Annual Institute on Nonviolence in Montgomery, Ala, on Dec. 5, 1957. About the quote, footnote No. 20 states the following: King adopts this passage from the American missionary E. Stanley Jones’s Mahatma Gandhi: An Integration (New York: Abingdon-Cokesbury Press, 1948), p. 88: “The weapons Gandhi chose were simple: We will match our capacity to suffer against your capacity to inflict the suffering, our soul-force against your physical force. We will not hate you, but we will not obey you. Do what you like, and we will wear you down by our capacity to suffer. And in the winning of the freedom we will so appeal to your heart and conscience that we will win you. So ours will be a double victory&emdash;we will win our freedom and our captors in the process.” King underlined the preceding quote in his copy of Jones’s book, and he made frequent use of it in his discussions of nonviolence.