Vasiṣṭha's teaching (Mahārāmāyaṇa) 6.28.65

6.28.65

āsthārahitayā buddhyā vihartavyamihānagha .
kartavyameva kartavyamakartavyamupekṣyate .. 65

65. [Sanskrit available] Having thus ascertained the certitude of this truth, rely thy faith on the reality of thy spiritual essence, and by giving up thy reliance on thy frail body, manage thyself with indifference in this unreal world.

66. [Sanskrit available] Adhere to what is thy duty here, and avoid whatever is prohibited to thee; and thus proceed in thy course with an even tenor of thy mind, without minding at all about thy reliance on the one and miscreance of the other.