Listening to a youtube Dhamma talk by Ajahn Jayasaro, he describes Buddhist faith as a form of confidence, the same way that a scientist, having tested a hypothesis a number of times, has faith or confidence in the outcomes. As has been mentioned here earlier, the Buddha never insisted on untested faith, or a faith based on blindly accepting what one is taught. Yet, having been vetted for nearly 2600 years, the Buddha's teachings inspire confidence in his methodology, and the science (physics, psychology, et al) is corroborating much of what the Buddha taught with respect to dependent origination, the release of dukkha, anatta, anicca, and is even venturing into the corroboration of rebirth. The 4NT do seem, upon testing, to be a profoundly excellent way to live our lives, and we know from experience that acts of bright kamma over time tend to produce brighter kammic outcomes.
What distinguishes Buddhism from religions of "faith" is this quality of pragmatism, rationality, and scientific soundness. We have confidence in it not because some book says we must believe, not because we think that G-d wrote it, but because upon testing, it works, and it resonates with all that is rational, compassionate, ethical, and reasonable. And that is a sound foundation upon which to build your spiritual house.