Berean Standard Bible (BSB)
So the one who thinks he is standing firm should be careful not to fall.
World English Bible (WEB)
Therefore let him who thinks he stands be careful that he doesn’t fall.
Strong's King James
Wherefore{G5620} let{G991} him that thinketh{G1380}{(G5723)} he standeth{G2476}{(G5760)} take heed{G991}{(G5720)} lest{G3361} he fall{G4098}{(G5632)}.
The F.O.G *
(12) So then, let the one thinking he stands, see they don't fall!
The F.O.G Message *
Young's Literal Translation
so that he who is thinking to stand—let him observe, lest he fall.