Romans 2:14
For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
Cross-reference
Romans 2:12 establishes the principle that those without the law perish; the main verse then shows Gentiles doing the law by nature.
Romans 2:27 extends the argument: the uncircumcised who keep the law will condemn those who have the written code but break it.
Romans 1:32 shows people who know God's decree yet sin — contrasting with those who by nature do the law.
Romans 3:1 directly asks what advantage Jews have if Gentiles can do the law — a logical follow-up to the main verse.
Romans 3:2 answers by noting Jews were entrusted with God's oracles — building on the main verse's point about Gentiles.
Romans 1:19 speaks of what is known about God being plain — similar to the law written on hearts by nature.
Romans 1:20 expands on natural revelation through creation — parallel to conscience revealing the law in Romans 2:14.
Psalm 147:20 says other nations do not know God's rules, directly opposing the main verse's claim that Gentiles do the law by nature.
Psalm 147:19 says God gave statutes to Israel, while the main verse states Gentiles do the law by nature — a contrast in how law is known.