I don't know what you're asking. This is as odd a question as asking, 'Is science true?'

Do you mean the writings of Lavoisier, Darwin, or Einstein? Do you mean all their work or some of it? Do you mean their methodological framework, qualitative research, experimental findings, or hypothetical extrapolations?

Do you mean 'true' as "factual", corresponding to reality, correlated to the entire scientific theory, or serving some given purpose well or something else?

God exists as a necessary being that is in a certain sense self-caused. It's not that God just 'pops into being' for no reasons, it's that God cannot but be: he doesn't come into or go out of being. Though God's necessity is also of a distinct character from the necessity of, say, 2 + 2 = 4: God must be. Mathematical necessity is still contingent on being itself. Even were the universe (in whatever sense of "the universe" it makes sense to speak of) eternal, it wouldn't be necessary in that sense.