Tiferet is the ‘central’ Sefirah that the others all directly connect to. (Aside from Malkhut which passes through Yesod, but that’s for another day.) It thus unifies the Sefirot, helping prevent any one from becoming isolated, causing a character defect in a person.
“Without connection to the vision of Tiferet, human energy circles around itself.”
– “The Gift of Kabbalah,” Tamar Frankiel.
If you ever watch The Matrix movies, the character of The Merovingian exemplifies an isolated Hod, resulting in major ego issues.
The Aish Omer Meditation explains Tiferet in Hod as follows:
“Examine if your humility is compassionate. Does my humility cause me to be self-contained and anti-social or does it express itself in empathy for others. Is my humility balanced and beautiful?”