[jtracy]

That certainly is an interesting law. My guess is that it refers to the need to be focused in life. Most people run around just reacting to whatever life hands to them, without any particular plan. Because everything is important to them, nothing is especially important. If nothing is especially important, then there isn't enough time and energy to make anything into a great acheivement. To be really successful at anything requires focus. It requires a sacrifice of the time and energy that would otherwise be spent doing other things. Once you've committed to that, then other things really don't mean anything.
As Curly points out, it is up to you to decide what is going to be the most important thing in your life. What are you going to build up at the cost of ignoring other things that are going on in your life? That may be one of the most important, and the most difficult decisions you'll ever make.