The Christian philosopher has a perfect right to the point of view and prephilosophical assumptions he brings to philosophic work; the fact that these are not widely shared outside the Christian or theistic community is interesting but fundamentally irrelevant.
Alvin PlantingaBut lack of evidence, if indeed evidence is lacking, is no grounds for atheism. No one thinks there is good evidence for the proposition that there are an even number of stars; but also, no one thinks the right conclusion to draw is that there are an uneven number of stars. The right conclusion would instead be agnosticism.
Alvin PlantingaMost of us form estimates of our intelligence, wisdom, and moral fiber that are considerably higher than an objective estimate would warrant; no doubt 90 percent of us think ourselves well above average along these lines.
Alvin Plantinga