This quote from of John McCain's from February 2008 gives secular values voters a glimpse of the GOP nominee's non-secular side:

"I am proud to be a conservative, and I make that claim because I share with you that most basic of conservative principles: that liberty is a right conferred by our Creator, not by governments, and that the proper object of justice and the rule of law in our country is not to aggregate power to the state but to protect the liberty and property of its citizens. And like you, I understand, as Edmund Burke observed, that 'whenever a separation is made between liberty and justice, neither... is safe.'"