Although he did not explicitly state it, Zhou Tian could easily deduce his intended meaning.
It was not hard to guess—this deity clearly had a strained relationship with his nemesis. Otherwise, after defeating him, the nemesis wouldn't have chosen to seal him in this place.
Thus, when that mighty leader of the Divine Realm sealed his enemy at this location, Zhou Tian intervened to rescue him. Unless that leader was unaware of what happened here, he would certainly figure it out—and there's little doubt he wouldn't let Zhou Tian go unpunished.
Previously, Zhou Tian may have entertained naïve thoughts about easily becoming a key figure in the Divine Realm. But after entering it and experiencing various events, the hardships he encountered made him realize that with his strength, trying to survive in the Divine Realm—let alone becoming powerful—would be exceptionally difficult.