Some people see the glass as half full, and some people see it as half empty, but what I want to know is why somebody hasn't told me I've been drinking Hemlock!
- Lord Rassilon
This command requires us to keep our goal in sight and to ignore unneeded distraction. Too often we become engulfed in things that are completely irrelevant to the task at hand. Often these distractions are caused by unconscious value judgments, and blurring the line between what is objective and what is not. To illustrate:
Objective
~~~
Subjective
I need food
~~~
I need candy
I need social interaction
~~~
I need sex
You study Wicca
~~~
You worship Satan
I need clothes
~~~
I need designer jeans
This book is a Bible
~~~
This book is spiritual
Very often people lose objectivity and get themselves confused. An example of this is the freshman college student who begins with 'I am here to learn'. Over time and for various reasons 'I am here to learn', gets amended to 'I am here to learn how to party'
Another thing people tend to do is to forget the original configuration of the goal. Consider the young woman who dreams of falling in love. She ends up believing she is in love with a controlling and jealous man, and lives miserably ever after. The reason being she forgot what love really is. She became so overcome with the desire for her goal that she settled for what was present in order to claim a false victory.
For those who believe in a concept of 'sin', there is a lesson to be learned here. The original word used for sin was the Greek hamartia, which meant either 'falling just short of the mark', or 'intentionally missing the target', both of which are quite the point of this command. For 'sin' is nothing more than an inability or unwillingness to accept divine truths, allowing illusion to cloud one's reality.
This command has practical metaphysical applications also. Because we live in a structured multi-dimensional universe, we can move in more than one direction. While an individual may be bound to the planes they live on, they still have infinite movement possible within those planes. Those who practice astral travel can tell you that they can and have interacted with myriad realities, not all of them are rational.
When one changes ones reality (and it's easier than you might think), one may notice few differences in the beginning, as the worlds are close together they tend to diverge less. Failure to properly focus can lead to realities you may really not wish to experience.