KAṬHA UPANISHAD · 1.2.21

आसीनो दूरं व्रजति शयानो याति सर्वतः ।
कस्तं मदामदं देवं मदन्यो ज्ञातुमर्हति ॥ २१॥

āsīno dūraṃ vrajati śayāno yāti sarvataḥ ।
kastaṃ madāmadaṃ devaṃ madanyo jñātumarhati ॥ 21॥

Seated He journeys far off, lying down He goes everywhere. Who other than I is fit to know God, even Him who is rapture and the transcendence of rapture?