Who was this new cultivator in white clothing? Why had he suddenly appeared in the frame of Profound Sage Horizon's Profound Sage Speech? Moreover, from what he said just now, he was seemingly on the verge of facing his tribulation. If that was the case, what tribulation was he going to face—which rank? Among the myriad practitioners in the universe, there were quite a lot that didn't know Venerable White, and were thus curious.
In addition, the white-clothed cultivator just said: [I was closing up when I gained some sudden insight. Therefore, I came out to transcend my tribulation and go back once I'm done.]
Wasn't he being a bit too casual here? The 'heavenly tribulation' wasn't child's play, and one couldn't transcend it just because they wished to do so!
As for the fellow daoists that knew Venerable White, they raised their spirits because the heavenly tribulation that Venerable White was going to face was definitely that of the Profound Sage-rank.