Cherish your doubts, for doubt is the handmaiden 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 man fear for the truth, that doubt may consume it; for doubt is a testing of belief. The truth stands boldly and unafraid; it is not shaken by the testing; For truth, if it be truth, arises from each testing stronger, more secure. He that would silence doubt is filled with fear; the house of his spirit is built on shifting sands. But he that fears no doubt, and knows its use, is founded on a rock. He shall walk in the light of growing knowledge; the work of his hands shall endure. Therefore let us not fear doubt, but let us rejoice in its help: It is to the wise as a staff to the blind; doubt is the handmaiden of truth.