When you make manifestation a spiritual practice, then the perspectives it brings overflow into other aspects of your life. The reality of the community in which we all live becomes more apparent. The vision of your incarnation becomes broader, more ecological, more compassionate. Your attitudes and actions reflect a larger, more complete humanity. Whatever we want to manifest is already part of this infinite extended self, or part of its potential evolution.
Manifestation applies that insight.
One further insight I'd like to share, which is mostly Spangler's and partially mine, inspired by him. In a very real sense, everything that exists is participating in that universal manifestation project. Our own healing and spiritual growth, it seems to me now, involve primarily our intentionally serving and consciously participating in that project. To the extent we undertake our personal manifestation projects as part of that larger will and welfare, our intention is aligned with the larger benign flow of the universe, and thus increases both the probability and desirability of the success of those undertakings. Spirituality plays a gigantic role in my life and work.