“Faith is the evidence of the unseen.”

“What God asks of men, said [Billy] Graham, is faith. His invisibility is the truest test of that faith. To know who sees him, God makes himself unseen.”

“We may define "faith" as a firm belief in something for which there is no evidence. Where there is evidence, no one speaks of "faith". We do not speak of faith that two and two are four or that the earth is round. We only speak of faith when we wish to substitute emotion for evidence. The substitution of emotion for evidence is apt to lead to strife, since different groups substitute different emotions.”

“The faith of religion is belief on insufficient evidence.”

“Faith is the great cop-out, the great excuse to evade the need to think and evaluate evidence. Faith is belief in spite of, even perhaps because of, the lack of evidence.”

“Faith is conviction without evidence, and sometimes even in the face of contrary evidence. In some quarters, this quality is perceived as a virtue.”

“Before you have faith you must believe, and before you believe there must be evidence of some sort to persuade the mind. Faith is remembering that evidence and holding to it against all that seems to challenge or contradict it.”

“Scientific beliefs are supported by evidence, and they get results. Myths and faiths are not and do not.”

“The problem is that people think faith is something to be admired. In fact, faith means you believe in something for which you have no evidence.”

“Theologians intensely dislike the definition of faith as belief without—or in the face of—evidence, for that practice sounds irrational. But it surely is, as is any system that requires supporting a priori beliefs without good evidence. In religion, but not science, that kind of faith is seen as a virtue.”