श्रीभगवानुवाच । प्रजहाति यदा कामान्सर्वान्पार्थ मनोगतान् । आत्मन्येवात्मना तुष्टः स्थितप्रज्ञस्तदोच्यते

prajahāti yadā kāmānsarvānpārtha manogatān ātmanyevātmanā tuṣṭaḥ sthitaprajñastadocyate

Krishna says a person of steady wisdom is one who has let go of desires born in the mind and finds contentment within the Self itself.