One verse

Bhagavad Gita 5.24

5.24

योऽन्तःसुखोऽन्तरारामस्तथान्तर्ज्योतिरेव यः | स योगी ब्रह्मनिर्वाणं ब्रह्मभूतोऽधिगच्छति ||५-२४||

yo.antaḥsukho.antarārāmastathāntarjyotireva yaḥ . sa yogī brahmanirvāṇaṃ brahmabhūto.adhigacchati ||5-24||

antaḥ-sukhaḥ
happy from within
antaḥ-ārāmaḥ
actively enjoying within
tathā
as well as
antaḥ-jyotiḥ
aiming within
eva
certainly
yaḥ
anyone
saḥ
he
yogī
a mystic
brahma-nirvāṇam
liberation in the Supreme
brahma-bhūtaḥ
being self-realized
adhigacchati
attains

One whose happiness is within, who is active and rejoices within, and whose aim is inward is actually the perfect mystic. He is liberated in the Supreme, and ultimately he attains the Supreme.