Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Whether sixty or sixteen, there is in every human being's heart the lure of wonder, the unfailing child-like appetite of what's next, and the joy of the game of living. When the aerials are down, and your spirit is covered with the snows of cynicism and the ice of pessimism, then you are grown old, even at twenty, but as long as your aerials are up, to catch the waves of optimism, there is hope you may die young at eighty. Your life is time. To waste your time is to waste your life.
Imagination is more important than knowledge.
All those who wander are not lost .