The sound people can hear is like the constantly preached myoho (the teaching of Buddhism that is so deep it can't be explained in words), and the water, birds, trees and forest all make a Buddhist sound with Buddha's myoho.
また、聞こえてくる音声は、常に妙法を説くがごとく、水鳥樹林も仏の妙説と共に法音をのべる。