Vasiṣṭha's teaching (Mahārāmāyaṇa) 6.28.61

6.28.61

kau tau me sadasadbhāvau yanniṣṭhaṃ paritapyate .
iti niścayavatsvāntaṃ samyagjñānātmano muneḥ .. 61

61. [Sanskrit available] If I am something else beside this body, that is a reflection of the pure intellect; then tell me of what avail are these states of reality and unreality to me, and wherefore shall I rejoice or regret.

62. [Sanskrit available] The Sage who is fully conscious of the certainty of this truth in himself, does not feel any rise or fall of his spirits at his life or death, nor doth he rejoice or wail at either in having or losing his life.