Related:

• There is no wild beast so ferocious as Christians who differ concerning their faith.
  -- William E. H. Lecky (1838-1903)...
• Faith means intense, usually confident, belief that is not based on evidence sufficient to command assent from every reasonable person.
  -- Walter Kaufma...
• Never do a thing concerning the rectitude of which you are in doubt.
  -- Pliny the Younger (61-105 AD) -- Letters, Book i, Letter xviii, 5...
• Be not afraid of life. Believe that life is worth living, and your belief will help create the fact.
  -- William Jame...
• The best use of life is to spend it for something that outlasts life. -- William Jame
• To believe is to be strong. Doubt cramps energy. Belief is power.
• Doubt isn't the opposite of faith; it is an element of faith. -- Paul Tillich, German theologian.
• Genius...means little more than the faculty of perceiving in an unhabitual way.
  -- William James (1842-1910)...
• Life is doubt, and faith without doubt is nothing but death. -- Miguel de Unamuno