Bhagavad Gita · Chapter 2: The Path of Understanding
Bhagavad Gita 2.55
प्रजहाति यदा कामान् सर्वान् पार्थ मनोगतान् ।
आत्मन्येवात्मना तुष्टः स्थितप्रज्ञस्तदोच्यते ॥
prajahāti yadā kāmān sarvān pārtha manogatān | ātmanyevātmanā tuṣṭaḥ sthitaprajñastadocyate ||
When a person gives up all the desires of the mind, Arjuna, and is content in the self by the self alone, that person is said to be of steady wisdom.
Modern context
The first mark of the steady person is contentment that comes from within. Desires fall away because nothing is felt to be missing, not because they are forced down. Most of our wanting comes from a sense of lack. Someone at ease in themselves can enjoy things without needing them.