זוהר שמות — דף נז ע”א

The Ayelet — the Shekhinah — awakens at dawn and enters the two hundred palaces of the King. One who studies Torah at midnight rises with her before the King, and in the morning a thread of lovingkindness is drawn upon him. Whoever knows how to unify the holy Name properly establishes a singular nation in the world. Prayer uttered with heart, will and awe breaks all the walls of darkness and the King's face shines upon all worlds. Any priest who does not know how to unify the holy Name properly — his divine service is not a service, for everything depends upon this unification.