Sanskrit
नासतो विद्यते भावो नाभावो विद्यते सतः । उभयोरपि दृष्टोऽन्तस्त्वनयोस्तत्त्वदर्शिभिः ॥
nāsato vidyate bhāvo nābhāvo vidyate sataḥ ubhayor api dṛṣṭo'ntas tv anayos tattvadarśibhiḥ
Translation
The unreal hath no being; the real never ceaseth to be; the truth about both hath been perceived by the seers of the essence of things.
Annie Besant · The Bhagavad-Gita, translated by Annie Besant (4th ed., 1922) — Wikisource · Public Domain
Explanation
The most philosophically dense line so far. “The unreal has no being; the real never ceases to be” is doing real metaphysical work: it draws a line between what merely appears (bodies, sensations, circumstances — all of which change) and what actually is (the self) — and asserts that only the second kind of thing counts as truly existing.
Concepts