A scientist would not change their actions. Otherwise they would no longer be a scientist.
Accidents do lead to discovery. But if you made the same accident twice, the outcome is always the same.
The point I'm trying to make though is that everyone, scientist or not, makes hypotheses. Your hypothesis in this case might be that God exists. This is a valid hypothesis by the scientific method (if it's testable). However, as soon as you skip the 'testing' part and move right to the conclusions, you've lost science. You're now basing conclusion on premises that don't exist, because you haven't made them.
This is the difference between hope and faith. Hope stops at the hypothesis - something else might exist. It's possible. Once you conclude that something else does in fact exist, you're basing your opinion on faith.
Hope can take the place of faith, Hope is strong. And hope can coexist with reason.