Don't bother trying, you're clearly not equipped for it,
And I've heard theists say that "God is dead." So what? I'd suggest that most scientists are using "faith" as a way to express an apprehension of a high probability.
Again, an apprehension of a high probability. As time wears on, and the bus does not appear, the probability that it will drops and when you have decided that the likelihood of it appearing is sufficiently low, you make a new plan. You'd probably call that "loosing faith," but then I rather doubt that you've thought about this before now.