Faith, by definition, is the belief in something despite insufficient knowledge to be certain of its veracity.
Some beliefs require small leaps of faith (the example that the Sun will rise tomorrow), as the body of evidence supporting that prediction is overwhelming, while others – the existence of dark matter, the inflationary origin of our Universe, or the possibility of room-temperature superconductivity — may still be likely, but may also reasonably turn out to be wrongheaded. Yet in every case, there are two key components that make the prediction scientific:
1) The prediction, or the belief that the outcome can be accurately predicted, is predicated on the existence of quality evidence.
2) As the evidence changes — as we obtain more, newer and better evidence — and as the full suite of evidence expands, our predictions, postdictions and entire conceptions of the Universe change along with it.