I like this. Here are excerpts that serve to summarize:

1. Reason is only a tool and, therefore, can just as easily argue for evil as for good...In fact, it was irrational for any non-Jews to risk their lives to save Jews...reason alone can argue effectively for almost any position.

2.The second problem with reason alone as a moral guide is that we are incapable of morally functioning on the basis of reason alone.

3. Third, the belief in reason alone is itself based on an irrational belief -- that people are basically good.

4. Fourth, even when reason does lead to a moral conclusion, it in no way compels acting on that conclusion...People don't risk their lives for strangers on the basis of reason. They do so on the basis of faith --faith in something that far transcends reason alone.

He concludes:

Does all this mean that reason is useless? God forbid.

He ends this on a lighter note:

But if you want a quick evaluation of where godless reason leads, look at the irrationality and moral confusion that permeate the embodiment of reason without God -- your local university.