अभ्यासयोगयुक्तेन चेतसा नान्यगामिना ।
परमं पुरुषं दिव्यं याति पार्थानुचिन्तयन् ।। ८.८ ।।

abhyāsa-yoga-yuktena cetasā nānya-gāminā |
paramaṁ puruṣaṁ divyaṁ yāti pārthānucintayan || 8.8 ||

To make it clear that this is more an exposition of the mind’s potential and process, and not something that subsists solely on Krishna’s personality, he immediately sets forth the general, universal proposition:

By the force of constant thinking and reflection, one attains to the supreme divine State, provided such thinking remains exclusive and the mind takes to it with application.

The outcome in human life always follows its fond selection, will and effort. Abhyasa – consistent, assiduous practice – alone counts. This is where most seekers are likely to relent, and consequently meet failure.

It is all an inward process, wherein the mind alone is the supreme agent and functionary. Mind thrives on thoughts. And these thoughts are what should be looked into, purified and made exclusive. The emphasis is unambiguous and unmistakable.