Nothing comes from nothing...this is surely getting deep now.
I feel Parmenides bursting out saying “this is my thing folks!”
“And it’s my thing because my “thing” is something, and that which is no “thing” cannot be since some “thing”already is. Nothing cannot be!”
I believe Parmenides held that the universe must always be, because it exists. If nothing existed, there would be no universe. But since something “is” then nothing cannot be.