THE KEY IS YOUR CHI = = YOUR CHI IS YOUR KEY = = NO CHI NO KEY

YOUR CHI IS YOUR KEY  =  NO CHI    NO KEY 

The Key is Your Chi-Qi-KI to unlocking the doors. 

Chi the dragon of Chinese myth 

Ch'i, or Qi, the "Energy Force" subtly referenced in things like Star Wars or as Q in Star Trek (Q also wears the black saturn square hat in an episode, oh yeah and there is the Borg Cube etc). 

Qi-Chi-Key-KI = Mana = Prana = The Force = Spirit-Soul = (E=MC^2) = Breath of God etc. 
This is the 5th Element.