Mainly, Romans 1: 19-20
since what may be known about God is plain to them, because God has made it plain to them. 20 For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that people are without excuse.
Then it ought to be ridiculously easy for you to provide examples from the "created" world that demonstrate the invisible qualities of your particular god. And not just something like "Oooh, stars! Preeetty! Therefore, Goddidit!" Since Paul is claiming that everybody--including believers in other gods and goddesses--has no excuse not to believe in his specific god because it's just sooo self-evident, you should be able to demonstrate all of the important "invisible qualities" of your god from aspects of the real world. For example, if one has to believe in the Trinity to be saved, the Cosmos should prove the Trinity somehow, so that Muslims, Jehovah's Witnesses, etc. "are without excuse." If Paul is correct, this should be easy
. Go ahead, rub our faces in it.