Romans 1:18 Romans 1:18 says For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness;
Ro¬†1:19 Because that which may be known of God is manifest in them; for God hath shewed it unto them.
Which is saying the wrath of God is revealed to them that hold truth in unrighteousness. We as humans have the law of God in our conscience, so if we do what we know through our conscience and worship God as the creator of the universe, it is the same as the old testament saints. But if we know of Christ and can read his teaching we are without excuse because we hold the truth. To learn more read and study the book of Romans. Its all in there.
God bless your efforts.