Vasiṣṭha's teaching (Mahārāmāyaṇa) 6.28.73

6.28.73

yadekametayovetsi ramyaṃ tadrāma saṃśraya .
dvābhyāmevātha vai tābhyāṃ darśanābhyāmihānagha .. 73

73. [Sanskrit available]
It is well Rama, and for your good also if you know either of these; because both of these views will tend equally to your felicity.

74. [Sanskrit available] Conduct yourself in this manner, O blessed Rama! and lessen gradually all your affection and dislike to this world and all worldly things. (i.e. Neither love nor hate aught at any time).