It's not faith. It's logic. I see a history of scientific theories turning out to be correct and religions admitting they were wrong a few generations later, so I presume the pattern will continue.
That was my main point. You presume, believe, trust that one day science will give us an answer regarding what caused the universe to come into existence based on what science has given us thus far.
This is what is called methodological naturalism which falls under philosophical naturalism.
But it is my contention that metaphysical naturalism is demonstrably fallacious and self defeating. I can also defend my position if you would like to debate me on it.
And besides, I have not seen you present a good reason as to why we should presuppose it in the first place.
I can formulate your position into a syllogism as follows:
1. If we observe a history of scientific theories coming true, then metaphysical naturalism is true
2. We observe a history of scientific theories coming true.
3. Therefore, metaphysical naturalism is true.
Premise 1. is false. This is one argument why.
Just because we can look back and see a pattern of validation of scientific theories, it does not follow that therefore all that exists is natural forces. That line of reasoning is an example of a non-sequitur. There could be a transcendent agent who is the source and superintendent of said forces. In light of our current knowledge of the cosmos as well as our knowledge that the past can not be infinite, I would say that the alternative hypothesis I mentioned is far more probable.
Premise 2. Is contestable.
It is true, we see a pattern of scientific theories coming true over a period of time. We also observe a pattern of scientific theories being proven false over a period of time. All this shows is that the scientific method is limited to the degree of knowledge that scientists possess.