We may sometimes ignore the claims of reason and rest satisfied, though usually unconsciously, with assertions which are conflicting when critically … - D. T. Suzuki

The Zen master is a strange sort of man. He will not listen to you and to what you may tell him about sciences modern or ancient. He knows his business better from his experience.

The Dharmakaya is now conceived by the human heart as love and wisdom, and its eternal prayer is heard to be the deliverance of the ignorant from their self-created evil karma which haunts them as an eternal curse. The process of deliverance is to awaken in the mind of the ignorant the Samyaksambodhi, or most perfect wisdom, which is the reflection of the Dharmakaya in sentient beings. This wisdom, this Bodhi, is generally found asleep in the benighted, who are in a spiritual slumber induced by the narcotic influence of evil karma, which has been and is being committed by them, because of their non-realization of the presence in themselves of the Dharmakaya. p 8

The head is conscious while the abdomen is unconscious. When the master tells his disciples to “think** with the lower part of the body, he means that the koan is to be taken down to the unconscious and not to the conscious field of consciousness.