Youth is not a time of life, it is a state of mind. People grow old only by deserting their ideals and by outgrowing the consciousness of youth.
Years wrinkle the skin, but to give up enthusiasm wrinkles the soul.
You are as old as your doubts, your fears and your despair. The carpenter I hired to help me restore an old farmhouse had just finished a rough first day on the job. A flat tire made him lose an hour of work, his electric saw quit, and now his ancient pickup truck refused to start. While I drove him home, he sat in stony silence. On arriving, he invited me in to meet his family.