Colossians 3:2 - A healthy obsession?

"The [things] above be thinking not the [things] upon the earth."  

-Paul says to be presently, constantly thinkng about the things above, the things of heaven.  AND he adds to NOT be thinking about the things on earth.  It is said that some people are so ‘heavenly-minded’ that they are of no earthly good.  Can’t have that, can we?  But what that statement actually is, is a copout, an excuse to rationalize away and lower the bar which God has set for us.  We could say that Paul set the bar high, but we all know it is the Lord speaking thru him.  And the Lord is saying, seek Him first.  Seek the Kingdom of Heaven first.  Be thinking about the things of Heaven first and foremost - not in a monastic reclusive withdrawing-from-the-world kind of way, but rather in a salt-of-the-earth light-of-the-world kind of way.  Become obsessed with them.  Yes, the things of Heaven are to intrude on our lives and into our consciousness in a pervasive way and to a troubling extent.  They can and will upset the proverbial oxcart, both for us and for those around us.  Yes, they will trouble and transform our ordinary worldly grounded lives, but with other-worldly priorities, with heavenly values.  And that’s the whole idea - we embrace and develop a whole new set of values.  God, His glory, His Word, all the things that God wants, the kingdom of heaven, the souls of men and women and children who would populate its golden streets - these become more important to us than all the other things on earth which may concern or otherwise interest us.  And so we still have family, but our love for the Lord becomes so great that it makes our love for even our immediate family pale and look like hate in comparison (cf Luke 14.26).  Our devotion to the Kingdom of Heaven becomes the One (appropriate and healthy) Obsession, so great that it permeates everything we do.  We still have neighbors, who we love and serve, but we grow to want nothing more than to love them into the kingdom of heaven.  We still have a job and friends and pasttimes, but Heaven invades all of that and takes over.  Will we ever get to 100% things above and 0% things on earth?  Probably not this side of heaven.  But neither is that an excuse for business/thinking as usual.  We must be pressing on, ever growing in our capacity for and habit of focusing on the things of Heaven.