Antigone 2

"All men fall into son. But sinning, he is not for ever lost."
Pg.153

This seems like a Biblical principal. If so, how or why might Sophocles include it if the Greeks were pagans?

Antigone

"learn to seek your gain where gain is yours to get, not try to grasp it everywhere."
-Creon

What is the purpose of Creon saying this?
What might the audience expect to understand by this?