What is most important?

In the Billy Crystal movie "City Slickers," there is a scene where Billy Crystal is riding with Jack Palance (who plays a wild cowboy). Billy Crystal has taken a 2-week vacation on a dude ranch, but the vacation is more than he bargained for. In this one scene, Jack Palance is telling Billy Crystal about the secret of life. He says it is about one thing; the one thing that is most important to you.
There is indeed “one thing” in our lives that should be most important; one thing that brings perspective to our lives; one core desire of the soul. And the sad truth is that most people never discover their “one thing.” People desperately long to find it, but they’re not sure where to look. God has programmed us with this “one thing” into our lives like computer software. The apostle Paul talks about it like this in Ephesians 2:10, “For we are God’s workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.” This good work is that most essential part of you.
The easiest way to discover this one thing is to see what you are most passionate about. What is it that stirs your soul? What is it that energizes you? What makes you tick?
This "one thing" is the difference between efficiency and effectiveness. Efficiency is doing things right. Effectiveness is doing the right things. I can’t tell you what your “one thing” is. You have to discover that for yourself. But I can tell you that if you take the time to take stock of your life, and begin to move your faith into action, and start living out your passions, then you will find where you need to be, and will have a significant and meaningful life.
Everyone has a passion in their soul. It may be helping kids. It may be making things for others. It may be teaching. But we all have "one thing" that we are created to do. I encourage you, if you haven't discovered it already, to begin to search out what is that "one thing" you need to pursue. If you could do anything, and know you would succeed, and that you had available to you everything you needed, what would you do?