Subtlest of the subtle, greatest of the great, the ātman is hidden in the cave of the heart of all beings. He who, free from all urges, beholds Him overcomes sorrow, seeing by grace of the Creator, the Lord and His glory.§
Kṛishṇa Yajur Veda, Śvetāśvatara Upanishad 3.20. VE, 735§