Romans 1:18-19 "For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men who suppress the truth in unrighteousness, because that which is known about God is evident within them; for God made it evident to them."

When the judgment of God comes against all ungodly and unrighteous men, it will be a just judgment.  These men have suppressed the truth, covering it with sin.  God has made Himself known, it is evident or there is evidence that is suppressed.  Why is this important?  No one is without excuse, no one.  God has made Himself known, we must live in light of His existence or else we will face His wrath for suppressing the truth revealed to us.