Youth is not a time of life; it is a state of mind, a product of the imagination, a vigor of the emotions, a predominance of courage over timidity - an appetite for adventure.
Nobody grows old by living a number of years. People grow old when they desert their ideals. Years wrinkle the skin, but to give up enthusiasm wrinkles the soul.
Worry. Self-doubt. Fear and anxiety. These are the culprits that bow the head and break the spirit.
Whether 16 or 70, there exists in the heart of every person who loves life the thrill of a new challenge, the insatiable appetite for what is coming next. You are as young as your faith and as old as your doubts.
So long as your heart receives from your head messages that reflect beauty, courage, joy and excitement, you are young. When your thinking becomes clouded with pessimism that prevents you from taking risks, then you are old. And may God have mercy on your soul.