Bhagavad Gita · Chapter 6: The Path of Meditation
Bhagavad Gita 6.21
सुखमात्यन्तिकं यत्तद्बुद्धिग्राह्यमतीन्द्रियम् ।
वेत्ति यत्र न चैवायं स्थितश्चलति तत्त्वतः ॥
sukhamātyantikaṃ yattadbuddhigrāhyamatīndriyam | vetti yatra na caivāyaṃ sthitaścalati tattvataḥ ||
when one knows that boundless happiness which is grasped by the understanding and lies beyond the senses, and, established in it, never moves away from the truth;
Modern context
This happiness is called boundless, and two things set it apart. It is beyond the senses, so it does not depend on anything pleasant reaching the eyes, ears or tongue. And it is grasped by the understanding, which means it is not a vague feeling or a trance but something clearly known. Sensory pleasure peaks and fades. This happiness, once known, does not fade, and the person established in it does not slip away from the truth.