If you have the WHY, the HOW will follow

Years ago I heard a Christian author mention that "discipline follows vision."  What do you think?  If I have vision to lose 15 pounds, will I have the discipline to exercise and eat right so that it happens?  This is one of those sayings that make you go "hmmmm."  Here is my take on it:
1) Scripture says without vision people perish.  In light of the truth of God's Word, without vision, we move into a state of maintenance and maintenance does not lead to improvement.  Take a table with a wobbly leg for example.  I know you can stick a small toothpick or piece of wood in the hole to fill in the gap but after time you will find that there is a need for repair again.  Finally, that leg is not going to get better.  A new hole has to be drilled or a new table to replace it.  If I don't have a God-given goal for losing weight, educating my children, etc., I will fall into just existing.   I know folks like that and they are living an unsatisfied life because they let go of the goal, the vision, that God gave them.  IN a sense, they are dying inside.  Benjamin Mays said it like this: "It must be borne in mind that the tragedy of life does not lie in not reaching your goal. The tragedy of life lies in having no goal to reach.” Do I believe everyone has goals? a mission for life?  Yup, I think its part of our nature whether we want to recognize it or not.
2) Vision is like the "WHY."  Why am I working out?  Why did I pass on another piece of chocolate cake?  Because I want to lose 15 pounds. Because I have been the homeschool arena a number of years, I have seen my share of folks start homeschooling only to quit within the year.  WHY?  Yes, that's the answer.  What is?  WHY is!  O.K., that is starting to sound like "Who's on first?" with Abbott and Costello so let me put it to you this way.  People do not stop homeschooling because there is a lack of curriculum or they do not have enough money.  The homeschool business is booming with ideas with textbooks, workbooks and the like.  People are giving away books; libraries hold shelves of "curriculum," so that cannot be WHY they stopped.  They lost the WHY!  I recently came across an ebook entitled " A Stong Enough WHY"  which addresses this very issue.  The condensed version is that the WHY will propel you through the problems of the HOW.  Interesting concept in light of my first quote.  So could we actually apply this not just to homeschoolers, but to several aspects of life.  If I held on the WHY of losing weight, I would know the HOW? 
3) Discipline follows Vision.  Is discipline the HOW?  Good question.  I usually know WHAT I need to do but still lack the discipline.  So maybe there is more to this idea.  Let's chew on this a bit more.