Live your life and forget your age.
If you want to learn something, read about it. If you want to understand something, write about it. If you want to master something, teach it.
People are always blaming their circumstances for what they are. I don’t believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and if they can’t find them, make them.
—George Bernard Shaw