The Mukhya Upaniṣads

Kena · Khaṇḍa 2 · Known in Every Cognition

Mantra 5

इह चेदवेदीदथ सत्यमस्ति न चेदिहावेदीन्महती विनष्टिः ।भूतेषु भूतेषु विचित्य धीराः प्रेत्यास्माल्लोकादमृता भवन्ति ॥ ५ ॥

In plain words

If one has known That here, then life has truth. If one has not known It here, the loss is immense. Discerning the Self in every being, the wise go beyond this world and become immortal.