One of the titles of the Báb is: “Him Who is the Sublime Gate of God”

As to those who deny Him Who is the Sublime Gate of God, for them We have prepared, as justly decreed by God, a sore torment. And He, God, is the Mighty, the Wise. 

- The Báb  (From the Qayyúmu’l-Asmá’; ‘Selections from the Writings of the Báb’)