As mortals, we're ruled by conditions, not by ourselves.
The mind's capacity is limitless, and its manifestations are inexhaustible. Seeing forms with your eyes, hearing sounds with your ears, smelling odors with your nose, tasting flavors with your tongue, every movement or state is all your mind.
Whoever realizes that the six senses aren't real, that the five aggregates are fictions, that no such things can be located anywhere in the body, understands the language of Buddhas.
If your mind is pure, all buddha-lands are pure.
In contemplation, one's mind should be stable and unmoving, like a wall.