Essence
True Nature, Substance, Reality
noun, の adjective
ほんしつ
本質 (ほんしつ) Essence, True Nature, Substance, Reality
真髄 (しんずい) Essence, Pith, True Meaning
神髄 (しんずい) Essence, Spirit, True Meaning
Book 本 ほん shit しつ can't teach you the Essence of life.