張載集

A collected set of essays, letters and notes that develops a unified metaphysical and ethical system centered on qi and the alignment of human nature with heaven. It treats cosmology and natural change, the interplay of yin and yang, and the conditions for sincere moral self-cultivation, while explaining the role of rites, music and ritual practice. Longer treatises set out theoretical foundations for reading the classics; shorter pieces and aphorisms apply those principles to governance, mourning, education and everyday conduct, aiming to translate lofty theory into practical guidance for ethical discernment and communal life.