"Prayer is meaningless unless it is subversive, unless it seeks to overthrow and to ruin the pyramids of callousness, hatred, opportunism, falsehoods. The liturgical movement must become a revolutionary movement, seeking to overthrow the forces that continue to destroy the promise, the hope, the vision." -- Rabbi Abraham Joshua Heschel (b. 1907-01-11, d. 1972-12-23), "On Prayer", 1969 [thanks to TheRaDR for tweeting this]