“Reason alone is insufficient to make us enthusiastic in any matter.” — François duc de la Rochefoucauld, 17th-century French memoirist and philosopher

“What a man accomplishes in a day depends upon the way in which he approaches his tasks. When we accept tough jobs as a challenge. . . and wade into them with joy and enthusiasm, miracles can happen. When we do our work with a dynamic conquering spirit, we get things done.” — Arland Gilbert

“Zeal will do more than knowledge.” — William Hazlitt, early 18th-century English essayist and literary critic

“Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it is the only thing that ever has.” — Margaret Mead, 20th-century American anthropologist

“The conclusions of passion are the only reliable ones.” — Soren Kierkegaard, early 19th- century Danish philosopher

“Make no little plans! They have no magic to stir men’s blood.” — Daniel Burnham, 19th- century Chicago architect

“Passion, though a bad regulator, is a powerful spring.” — Ralph Waldo Emerson, 19th- century American essayist, public philosopher and poet

“The two sovereign remedies for dullness are love or a crusade.’’ — D.H. Lawrence, 20th- century English novelist

“Know the true value of time; snatch, seize and enjoy every moment of it. No idleness … never put off till tomorrow what you can do today.” — Lord Chesterfield, 18th-century English man of letters