As I gain in spiritual understanding, the material side of my life slips. How can I balance the two?
The entirety of your life is spiritual. This Universe is a spiritual enterprise, not a material one. As your awareness of the wisdom and compassion of the Universe begins to unfold, it is natural that circumstances and activities that once held the highest priority for you are no longer as important.
Ralph Waldo Emerson, a great American observer of inner transformation, observed that most individuals are concerned that their neighbors might cheat them. However, there comes a time in the spiritual evolution of an individual when he becomes concerned that he does not cheat his neighbor. That is when his life become transformed from an experience of the ordinary into appreciation of the miraculous.
Relax and enjoy the process of your own spiritual unfolding. Experiment with new orientations and perceptions before you judge them.
Here is the link to Gary Zukav's site.