Mel,
By chance have you ever experienced christian "burn-out"? The feeling that, while you would never turn your back on God, you can't help but feel that you are spinning your tires and going absolutely nowhere. It's happened to me and a lot of christians that I know.
I can even tell you why. Christian "burn-out" occurs when no matter where you go or what you do, you just can't seem to find your place, your niche. You basically become a boat with no wind behind it's sails. You loose any and all motivation. This usually happens to christians when they volunteer themselves tirelessly yet they don't see any progress toward a specific goal or vision.
However, if you read the entire contents of Matthew, chapters 5 through 7, you will find that nowhere in the scripture does it talk about you or your dreams and goals. In fact, the scripture tells us that, while we should be humble and resilient servants, we are not to focus on treasures of this world but "lay up treasures in heaven".
Matthew chapters 5 - 7 are known as "The Sermon On The Mount". Basically this where Jesus describes to us how we should live as followers of Christ. If you read through the Sermon carefully you will notice a simple theme... SELFLESSNESS. When you get to the very core of the christian (Kingdom) lifestyle as it is described in scripture, you will find that a true christian (Kingdom citizen) labors out of love and does not give in to selfish pursuits. When you finally experience this revelation for yourself and it begins to take root both in your heart and mind, there is much freedom to be found in it because it is very difficult for the enemy to tempt when your thoughts and actions are consumed on the benefit of others rather than personal gain. This is a concept that the enemy can not understand.