Five Gates of Tao-hsin:

Let it be known: Buddha is the mind. Outside of the mind there is no Buddha. In short, this includes the following five things:

First: The ground of the mind is essentially one with the Buddha.

Second: The movement of the mind brings forth the treasure of the Dharma. The mind moves yet is ever quiet; it becomes turbid and yet remains such as it is.

Third: The mind is awake and never ceasing; the awakened mind is always present; the Dharma of awakened mind is without specific form.

Fourth: The body is always empty and quiet; both within and without, it is one and the same; the body is located in the Dharma world, yet is unfettered.

Fifth: Maintaining unity without going astray — dwelling at once in movement and rest, one can see the Buddha nature clearly and enter the gate of samadhi.