Bhagavad Gita Verse 6.8

जिसका अन्तःकरण ज्ञान विज्ञानसे तृप्त है, – जिसकी स्थिति विकाररहित है, जिसकी इन्द्रियाँ भलीभाँति जीती हुई हैं और जिसके लिये मिट्टी, पत्थर और सुवर्ण समान हैं, वह योगी युक्त अर्थात् भगवत्प्राप्त है, ऐसे कहा जाता है|

he Lord explained: When one’s mind is at peace and fully contented with the Gyan (Knowledge or wisdom) it has acquired, one whose mind is constantly stable and fixed in God, who has controlled his senses well and considers dirt, stone and gold as one, is said to have achieved unity with God. He is the perfect Yogi, O Arjuna.