While it's certainly possible to leave a mark on the world and affect others, life has no actual meaning to you because at the end, you die.

You get one shot. Make the most of it while you're here and don't let too much of it pass by unnoticed. Know yourself. Make every effort to satisfy the yearnings within you no matter how big or small, share your time with people who are truly good for you (and in turn, you are good for) and don't take any **** from anyone. Don't regret mistakes, learn from them. Check out with a smile on your face or at least confident that you gave it your best.