Can anyone provide an argument for a necessary being?

[Neo-Scholastic]

Aristotle himself was not trying to give a proof for a divine being. It just s happened that a working definition for a nessesary being came out of his argument. The question with which he was concerned was how things preserve their identity throughout change. The atheistic dilemma is to solve that problem without referring to a fundamental principle governing the tension between static being and constant change.