[790] "Having gained equanimity and serenity that is purified" (laddhānupekkhaṃ samathaṃ visuddhaṃ): **Equanimity** (upekkhā) — that which, in the fourth jhāna, is equanimity, the act of looking on with equanimity, the state of looking on with even-mindedness, tranquility of mind (citta), neutrality of mind. **Serenity** (samatha) — that which is steadiness of mind, stability, fixedness, non-wavering, non-distraction, the state of a mind not drawn away, serenity, the faculty of concentration (samādhi), the power of concentration, right concentration. In the fourth jhāna, equanimity and serenity are pure, purified, cleansed, without blemish, free from mental defilements, become malleable, wieldy, steady, attained to imperturbability. "Having gained equanimity and serenity that is purified": having gained, having obtained, having acquired equanimity and serenity in the fourth jhāna — thus, "having gained equanimity and serenity that is purified." One should wander alone, like a rhinoceros horn. Therefore that Paccekasambuddha said:
Having put behind him pleasure and pain,
and, even earlier, joy and grief,
having gained equanimity and serenity that is purified,
one should wander alone, like a rhinoceros horn.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.