Bhagavad Gita 8.8अभ्यासयोगयुक्तेन चेतसा नान्यगामिना।परमं पुरुषं दिव्यं याति पार्थानुचिन्तयन् ॥

Abhyasa means practice. Practice is the constant repetition of one idea of God. In the practice of meditation Vijatiya Vrittis (worldly thoughts or thoughts of a type different from the object of meditation) are shut out and there is Sajatiya Vrittipravaha (continous flow of thoughts of the Self or the Absolute alone). This is Abhyasa. Abhyasa is Yoga. This will terminate in Nirvikalpa Samadhi. The Yogi with Samahita Chitta (equanimity of mind) attains Paramatman or the Supreme Soul. Just as the rivers abandoning their names and forms because one with the ocean, so also the sage or the Vidvan, being liberated from names and forms, and virtue and vice, becomes identical with the Supreme Self.The most vital factor in this practice is regularity. Be regular in your meditation. You will soon reach the goal.Purusham Divyam The resplendent, transcendental Being or the Inner Ruler (Antaryamin) in the solar orb.He who meditates constantly without allowing the mind to wander among the sensual objects, in accordance with the instructions of the scriptures and the perceptor reaches the Supreme Purusha.