Nobody grows old merely by living a number of years. We grow old by
deserting our ideals. Years may wrinkle the skin, but to give up
enthusiasm wrinkles the soul.
-- Samuel Ullman
Youth is not a time of life, it is a state of mind it is a temper of
the will, a quality of the imagination, a vigor of the emotions, a predominance
of courage over timidity, of the appetite for adventure over love of ease....