Could Teilhard de Chardin, Thomas Merton, Bede Griffiths, C.S. Lewis, and Meister Eckhart been completely wrong? Were these men the product of some benevolent (or perhaps malevolent) form of self-deception? Were they believers because the delusion that Richard Dawkins writes about was somehow more commanding in their minds than in the "normal" minds of people like Mr. Dawkins? Keep in mind that were are talking about some of the most potent mystics and well read authors that date back to the 14th century (in the case of Eckhart). These men LIVED the faith they professed through some of the most excruciating times of their lives, and maintained fidelity to their maker until the moment they drew their last breath. Does this prove conclusively that God exists, or that he is not the by-product of the electrical impulses that permeate our brains? No, it does not. But they sure do give you something to think about.
"Someday, after mastering the winds, the waves, the tides and gravity, we shall harness for God the energies of love, and then, for the second time in the history of the world, man will have discovered fire."
-Pierre Teilhard de Chardin