Korean cosmology mapping Heaven (dot), Earth (horizontal), and Human (vertical).
Cheon-Ji-In is the Korean triad of Heaven, Earth, and Human — but its genius is that it became script. The three primal vowel strokes of Hangul are a round dot (Heaven), a flat line (Earth), and an upright line (Human); every Korean vowel is built by combining them.
Cheon-Ji-In unlocks something rare: a cosmology compiled directly into a writing system, philosophy made operational as letterforms. It shows that a worldview need not stay abstract — it can be encoded into the very strokes a civilisation writes with, so that to spell is, quietly, to recite the cosmos.