“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.”

“A man doesn't grow old because he has lived a certain number of years. A man grows old when he deserts his ideal. The years may wrinkle his skin, but deserting his ideal wrinkles his soul.”

“Nobody grows old merely by living a number of years. People grow old by deserting their ideals. Years wrinkle the skin, but giving up enthusiasm wrinkles the soul. Worry, doubt, self-distrust, fear and despair - these are the long years that bow the head and turn the growing spirit back to dust. You are as young as your faith and as old as your doubts; as young as you self-confidence, as old as your fear; as young as your hope, as old as your despair.”

“Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.Youth means a tempermental predominance of courage over timidity of the appetite, for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20. Nobody grows old merely by a number of years. We grow old by deserting our ideals.Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirits back to dust.Whether 60 or 16, there is in every human being's heart the lure of wonder, the unfailing childlike appetite of what's next and the joy of the game of living. In the center of your heart and my heart there is a wireless station: so long as it receives messages of beauty, hope, cheer, courage and power from men and from the Infinite, so long are you young. When the aerials are down, and your spirit is covered with snows of cynicism and the ice of pessimism, then you are grown old, even at 20, but as long as your aerials are up, to catch waves of optimism, there is hope you may die young at 80.”

“We'll squeeze every second that we can from our lives, because we're young, and we have plenty of years to grow. We'll grow until we're braver. We'll grow until our bones ache and our skin wrinkles and our hair goes white, and until our hearts decide, at last, that it's time to stop.”

“If wrinkles must be written on our brow, let them not be written on our heart. The spirit should not grow old.”