"You may believe that you are responsible for what you do, but not for what you think. The truth is that you are responsible for what you think, because it is only at this level that you can exercise choice. What you do comes from what you think."
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 diamond is merely a lump of coal that did well under pressure. So imagine how brilliant a human being can be by sustaining pressures of life. Be hopeful..