How much do we want God?

Why is it that one Christian can come into a Sunday service and encounter God while another can sit right beside him and encounter nothing except a pesky fly?  One experiences the kabod glory and is weeping, repenting, rejoicing, strengthened, etc.  While another is just swatting the fly.  

The Scriptures assure us that if we seek God wholeheartedly, we will find Him. 

Jer 29:13 (NIV) You will seek me and find me when you seek me with all your heart.  

 The more intensely, the more desperately even, we seek God - the greater the likelihood of encountering God.  How much do we want God?