She is a Tree of Life: Etz Chayim Hee

"HEE" is "SHE"
So the familiar part that is most often translated as "IT is a tree of life" said in almost every service really says:

"She is a tree of life to those who hold fast to her, and all who cling to her are happy. Her ways are ways of pleasantness, and all her paths are peace"

Reference to the Torah in feminine gender is an interesting perspective on this Tree of Life.

The song of Etz Chayim Hee is one of my favorites.