I give lots of guest presentations to K-18 schools/universities all over the world. Since the subject is Space exploration, I frequently feel the need to invoke (using one of these very "generic" terms) "The Almighty," or "The Creator" (i.e. I NEVER use the terms "God," "Allah," "Bhagavan," etc).

When presenting in the United States at a public school, is it "legal" to do so? Being unsure, in the past, I generally have avoided the subject altogether.