In the Sōtō Zen tradition, shikantaza—“just sitting”—is not treated as a technique for manufacturing special states, but as the direct expression of buddha‑nature itself. The practitioner simply maintains upright, alert presence, allowing thoughts, emotions, and sensations to arise and pass without interference. Over time, this simple posture of wholehearted awareness stabilizes the mind: discursive thinking loses some of its momentum, attention becomes less fragmented, and the underlying clarity and stillness of mind become more evident beneath the usual inner commentary. The mind is not forced into silence; rather, its habitual story‑making gradually softens as experience is allowed to unfold on its own.

This way of sitting transforms the relationship to thoughts and emotions. Instead of identifying with them—“I am angry, I am anxious”—they are seen as transient phenomena that appear within a wider field of awareness. Thoughts and feelings are neither suppressed nor indulged, but observed as they come and go, like clouds moving through a spacious sky. Such non‑reactive observation weakens automatic patterns of clinging and aversion, and the subject–object split that ordinarily fragments experience is gently loosened. The mind learns to let phenomena arise and pass without compulsive interference, which naturally reduces reactivity and mental turmoil.

The emotional life is affected in a parallel way. Because shikantaza invites sitting with whatever arises—boredom, agitation, grief, joy—without immediately acting, emotional waves are still fully felt but tend to pass more quickly and with less destabilization. Equanimity and emotional regulation develop as the nervous system becomes more tolerant of strong states, and emotional volatility decreases as automatic reaction patterns are interrupted. This emotional acceptance does not mean indifference; rather, as self‑centeredness and rigid self‑images soften, compassion and empathy tend to emerge more readily. The non‑judgmental attitude cultivated on the cushion extends into daily life as greater patience, less impulsive speech and action, and a more steady, caring presence.

As shikantaza matures, its effects can be understood as a deepening manifestation of what is already present. By not constantly rearranging inner experience, patterns of clinging, aversion, and self‑protection become clearer, and insight into impermanence and the absence of a fixed owner of thoughts and emotions is fostered. Practice and realization are not regarded as two separate stages; sitting itself is the embodiment of awakened mind, what has been described as the complete manifestation of ultimate reality in ordinary experience. The cumulative result is a mind that is more spacious and clear, emotions that are more balanced and less domineering, and a way of being that is naturally more flexible, steady, and compassionate.