Consider the following:
* A purpose will motivate you.
* A purpose will keep your priorities straight.
* A purpose will develop your potential.
* A purpose will give you power to live in the present.
* A purpose will help you evaluate your progress.
I wanted you to know, brothers, that what has happened to me has really served to advance the gospel, so that it has become known throughout the whole imperial guard and to all the rest that my imprisonment is for Christ. And most of the brothers, having become confident in the Lord by my imprisonment, are much more bold to speak the word without fear. (Philippians 12:1-4)
John Maxwell. The Maxwell Leadership Bible.