He who fails to know his real and true competitor shall never be able to give a good account of his stewardship in life! Your true and real competitor is your real and true solemn duty to your Maker!
You and your purpose in life are the same thing. Your purpose is to be you.
Nothing that happens to you was meant to be. The only thing about you that was meant to be is you. Blaze your own trail.
The chief purpose of life, for any of us, is to increase according to our capacity our knowledge of God by all means we have, and to be moved by it to praise and thanks.
If heaven really exists: then heaven is the job, hell is unemployment, while life is merely an interview.