it requires that their proposals be subject to argument, and amenable to reason

2012.03.10
"I believe in a president whose views on religion are his own private affair, neither imposed by him upon the nation or imposed by the nation upon him as a condition to holding that office. I would not look with favor upon a president working to subvert the First Amendment's guarantees of religious liberty. Nor would our system of checks and balances permit him to do so. And neither do I look with favor upon those who would work to subvert Article VI of the Constitution by requiring a religious test--even by indirection--for it. If they disagree with that safeguard, they should be out openly working to repeal it."
Kennedy, 1960
Democracy demands that the religiously motivated translate their concerns into universal, rather than religion-specific, values. It requires that their proposals be subject to argument, and amenable to reason. I may be opposed to abortion for religious reasons, but if I seek to pass a law banning the practice, I cannot simply point to the teachings of my church or evoke God's will. I have to explain why abortion violates some principle that is accessible to people of all faiths, including those with no faith at all.
Obama, 2006
From Slate's piece on Santorum's Vomitous reaction to this kind of thinking.

"It requires that their proposals be subject to argument, and amenable to reason" is such an important idea, and so well expressed.