Zen meditation is discussed in books like Heart & Mind: The Philosophy of Meditation by Michael Martin (1969) and Meditation by David Swartzwelder (1972). These books discuss counting as a form of meditation, the narrowing of awareness to a microscopic level, a symbolic being like a plank in a stream, the self, or anything else. Zen meditation is often related to taming the animal mind and discovering a sublime mental state that can be controlled without effort or performance. Yoga and meditation are mentioned once more as methods for reaching a state of fulfilment devoid of any self-generated pleasure or load. The poet Takusu penned, "Thou shalt know the road for the sudden awakening of the mind" in the Japanese Yoga Sutra.