The text presents enlightenment in a very undramatic, almost understated way, treating it as “nothing special” rather than as a rare, exalted state. Enlightenment is described as the natural expression of one’s original nature or Buddha-nature, something already present rather than something to be acquired. In this sense, it is not separate from ordinary life; it is realized in the midst of everyday activities when they are carried out with full attention and a proper attitude. The emphasis falls less on a single, climactic breakthrough and more on a continuous clarification of perception and understanding, moment by moment.

A central theme is that practice and enlightenment are not two. Zazen is not portrayed as a technique to obtain enlightenment at some later time, but as the very manifestation of enlightenment itself when practiced without a gaining mind. Each moment of sincere sitting, with correct posture, breathing, and mental attitude, is said to be complete in itself. Enlightenment is thus approached as an ongoing process of practice-enlightenment, where the path and the goal are inseparable.

The notion of “beginner’s mind” is presented as the living expression of enlightened awareness. This mind is open, fresh, and free from fixed ideas, in contrast to the “expert’s mind” that is constrained by preconceptions. Maintaining such a mind allows reality to be seen directly, without the distortions of ego and rigid views. In this way, enlightenment is not a distant destination but the quality of presence that arises when each moment is met with this unassuming, receptive attitude.

Practically, the book counsels letting go of attachment to outcomes and observing thoughts and feelings without judgment, both in formal meditation and in daily life. Enlightenment is associated with the gradual loosening of self-centered thinking, so that actions arise in unobstructed harmony with circumstances. Ordinary activities—breathing, bowing, working, eating—become expressions of enlightenment when performed wholeheartedly, with undivided attention. Thus, enlightenment is portrayed as small and continuous rather than grand and final: an ever-present possibility realized through steady, humble practice.