In the final sermon, the Breakthrough sermon, Bodhidharma plainly states that the only way to gain enlightenment is to behold the mind. The true nature of all of us is awareness, and the only practice is to abide in awareness. The rituals etc. are metaphorical and are totally useless. Realization is here and now.
In the Wakeup Sermon, Bodhidharma points at the need to go beyond mind. The words engage the mind and delusion follows. Not using the mind to know that which cannot be known via mind is Zen. When this is known, everything we do and every state of the mind is Zen.
The doctrines are useless and so are hardships or devotion. Bodhidharma delivers only one message - that of instantaneous knowledge of one's true nature, nothing more. This mind is the Buddha mind. This mind is the movement. No motion, no mind, and since its essence is emptiness, it never really moves.
We start with Bloodstream sermon. Bodhidharma explains the mind and the self-nature. He puts it clearly that the mind itself is the self-nature and trying to find the self-nature beyond this mind is impossible. This mind is the Buddha. To realize this is Zen.
Reading the book - "The Zen teaching of Bodhidharma", with commentary and discussion. Bodhidharma is the father of Zen, which is based on the path of knowledge, as taught by Siddhartha Gautama Buddha himself. We explore its similarities with Advaita and other Nondual philosophies.