Today is the 40th anniversary of man’s first steps on the surface of the moon. On July 20, 1969, Apollo astronauts Neil Armstrong and Buzz Aldrin descended from the lunar module Eagle, with Armstrong uttering these famous first words: “That’s one small step for [a] man; one giant leap for mankind.” A short while later, Aldrin privately added some words to mark the occasion . . . from the Word. On his website author Eric Metaxas shares Aldrin’s little-known story of taking communion on the moon: “In the radio blackout, I opened the little plastic packages which contained the bread...