Cherish your doubts, for doubt is the attendant of truth. Doubt is the key to the door of knowledge; it is the servant of discovery. A belief which may not be questioned binds us to error, for there is incompleteness and imperfection in every belief. Doubt is the touchstone of truth; it is an acid which eats away the false. Let no one fear for the truth, that doubt may consume it; for doubt is the testing of belief. The truth stands boldly and unafraid; it is not shaken by the testing.
Robert T. Weston (Unitarian Universalist, minister)