Here's an interesting look at faith: "No Faith in Science -- why the Higgs boson is not like a sea of milk that sustains the gods."
Just because a scientifically minded person uses the word, faith, doesn't mean it is being used in the same sense as religious faith.
I have faith that global warming is happening, because the evidence in support of this conclusion is clear, convincing, and attested to by almost all of the world's climate scientists.
I don't have faith that Jesus saves, because this is a belief with zero demonstrable evidence backing it up.
The Slate article is well worth reading. Here's how it starts out.
A common tactic of those who claim that science and religion are compatible is to argue that science, like religion, rests on faith: faith in the accuracy of what we observe, in the laws of nature, or in the value of reason.
Daniel Sarewitz, director of a science policy center at Arizona State University and an occasional Slate contributor, wrote this about the Higgs boson in the pages of Nature, one of the world’s most prestigious science journals: “For those who cannot follow the mathematics, belief in the Higgs is an act of faith, not of rationality.”
Such statements imply that science and religion are not that different because both seek the truth and use faith to find it. Indeed, science is often described as a kind of religion.
But that’s wrong, for the “faith” we have in science is completely different from the faith believers have in God and the dogmas of their creed. To see this, consider the following four statements:
“I have faith that, because I accept Jesus as my personal savior, I will join my friends and family in Heaven.”
“My faith tells me that the Messiah has not yet come, but will someday.”
“I have strep throat, but I have faith that this penicillin will clear it up.”
“I have faith that when I martyr myself for Allah, I will receive 72 virgins in Paradise.”
All of these use the word faith, but one uses it differently. The three religious claims (Christian, Jewish, and Muslim, respectively) represent faith as defined by philosopher Walter Kaufmann: “intense, usually confident, belief that is not based on evidence sufficient to command assent from every reasonable person.”
Indeed, there is no evidence beyond revelation, authority, and scripture to support the religious claims above, and most of the world’s believers would reject at least one of them. To state it bluntly, such faith involves pretending to know things you don’t. Behind it is wish-thinking, as clearly expressed in Hebrews 11:1: “Now faith is the substance of things hoped for, the evidence of things not seen.”
In contrast, the third statement relies on evidence: penicillin almost invariably kills streptococcus bacteria. In such cases the word faith doesn’t mean “belief without good evidence,” but “confidence derived from scientific tests and repeated, documented experience.”
You have faith (i.e., confidence) that the sun will rise tomorrow because it always has, and there’s no evidence that the Earth has stopped rotating or the sun has burnt out. You have faith in your doctor because, presumably, she has treated you and others successfully, and you know that what she prescribes is tested scientifically. You wouldn’t go to a shaman or a spiritual healer for strep throat—unless you want to waste your money.