What does Guiguzi's translation mean by "calming the five internal organs and smoothing them"?

To be precise, it should be understood that if you want to focus on your real goal and the method is effective, you must start from your own heart and heart. Let go of all your persistent things, all your desires, and let your heart be quiet and peaceful. In this way, your mind and spirit will be in harmony and your internal organs will be smooth and harmonious. In this case, a person's own spirit and soul can return to self, without interference from external things and internal desires, so that he can look inward and listen inward, further determine his own direction and firm his own goals.