Mahabharata 12.26.26

सुखं वा यदि वा दुःखं प्रियं वा यदि वाप्रियम्प्राप्तं प्राप्तमुपासीत हृदयेनापराजितः

sukhaṃ vā yadi vā duḥkhaṃ priyaṃ vā yadi vāpriyamprāptaṃ prāptamupāsīta hṛdayenāparājitaḥ

Our plain-language meaning of this verse is waiting for scholar review.