How do you say "everything is one"

The reason why the old classics are enduring is also based on its own philosophical principle of "all things are unified into one". Taoism advocates that Tai Chi is infinite, and Tai Chi is divided into two devices, and then everything is male and female, and heaven and earth are yin and yang ... And if you want to survive, you must seek common ground while reserving differences, and yin and yang blend in and live in harmony. As far as Taoism is concerned, there are heaven, tunnel, humanity and nature.