light is a wave and also a particle

"The world of science lives fairly comfortably with paradox.  We know that light is a wave, and also that light is a particle.  The discoveries made in the infinitely small world of particle physics indicate randomness and chance, and I do not find it any more difficult to live with the paradox of a universe of randomness and chance and a universe of pattern and purpose than I do with light as a wave and light as a particle.  Living with contradiction is nothing new to the human being." - Madeleine L'Engle

"We do not have to understand in order to believe that behind the 

mystery and the fascination there is love."

 - Madeleine L'Engle

"To be a witness does not consist in engaging in propaganda, nor even in stirring people up, but in being a living mystery.  It means to live in such a way that one's life would not make sense if God did not exist." - Cardinal Emmanuel Suhard