Lotuses do not grow on dry lands of the plateau, but in muddy swamps. In the mud of afflictions, there are still sentient beings who are eager to listen to the teachings.
Thus, one should know that all afflictions nurture the nature of the Tathagata. For instance, if one does not descend into the vast ocean, one can never obtain the priceless pearl.
Thus, if one does not enter into the vast ocean of afflictions, then one can never obtain the treasures of wisdom.