Unflickering yoga meditation

आरुरुक्षोर्मुनेर्योगं कर्म कारणमुच्यते। 

योगारूढस्य तस्यैव शमः कारणमुच्यते।।

अष्टांगयोग के नवसाधक के लिए कर्म साधन कहलाता है और योगसिद्ध पुरुष के लिए समस्त भौतिक कार्यकलापों का परित्याग ही साधन कहा जाता है।  

Initially, action alone is said to be the cause of elevation for the sage desirous of attaining unflickering yoga meditation. When he has achieved continuous meditation, renunciation of all activity is delineated as the cause of his perfect trance in yoga. 

Dhyana means contemplation

Krishna said that one who works without desiring the fruit of his action is both a Sannyasi and a Yogi. Not someone who does nothing at all. To become a Yogi, one needs to act. After one has attained Yoga (union) with "That," then one practices S’ama (restraint, peace, inaction).

This is another important idea and often repeated in the Bhagavad Gita. You must act. There is no place at all forlaziness or irresponsibility or for shirking your duty. You must do it. Whatever your duty is. Once you do your duty,remembering that you are not the doer, and you do not hanker after the results, you are purified. (Playing the game is important – not winning or losing.) Once you remember that it is the Lord who causes everything to happen and once you identify with or unite with God, then you are in Yoga. You are barely aware of what you are doing. You are skilled in your work, at peace and at ease. Now it makes no difference whether you actively do things or not.

S’iva is often called S’ankara – the one who causes S’ama or peace. S’iva sits out the entire creation and sustenance in meditation and does "nothing" for the most part. Yet he gets into the fray, when called upon, and finally at the end, he is responsible for the dissolution. S’iva is the ultimate Yogi and the ultimate Sannyasi. He keeps nothing and is everything.

परम गति को प्राप्ति

प्रयत्नाद्यतमानस्तु योगी संशुद्धकिल्बिषः। 

अनेकजन्मसंसिद्धस्ततो याति परां गतिम्।।  

जब योगी समस्त कल्मष से शुद्ध होकर सच्ची निष्ठा से आगे प्रगति करने का प्रयास करता है , तो अन्ततोगत्वा अनेकानेक जन्मों के अभ्यास के पश्चात् सिद्धि - लाभ करके वह परम गति को प्राप्त करता है। 

With more arduous endeavor than previously, the yogi who fully purifies his consciousness by rejecting the filth of all worldly desires and mental images, finally achieves the fruit of many lifetimes of yoga practice. Thereafter, he reaches the supreme goal. 

Yoga requires moderation

Neither too much sleep and food, nor too little of it: and moderation in all actions. Total absorption in the Self – no desire for anything other than the Truth or Reality. Indifference to pain. Total Conviction and No depression. One should with draw by degrees. To such a Yogi whose Rajas (passion for action) has subsided, comes the supreme bliss of Brahman. Such a person sees the Brahman everywhere, the Self in all beings, and all beings in the Self.

He who sees Krishna everywhere and all things in Krishna does not lose sight of Krishna, nor Krishna of him. That person who worships Krishna residing in all beings the same, becomes a Yogi, and whatever he does he lives in Krishna. Arjuna then asked Krishna a question: Since the mind is essentially restless, how can it attain this equanimity? What happens to a person who has faith, but has a wandering mind?

Krishna then explained that practice can bring a restless mind under control. But should someone with faith be unable to concentrate, he will still never come to harm. Such a person will attain the worlds of the righteous and after spending many years there, he will be born again in the house of the pure and righteous, or into a family of Yogis. Such a birth is indeed rare. There he comes in contact with knowledge acquired in a previous birth and tries harder than before. Even a person who is merely interested in Yoga transcends the Vedas. Some Yogis attain the Supreme Goal over several births.

The Yogi is greater than ascetics, sages, and men of action. Therefore be a Yogi. And of all Yogis, those who are absorbed in Krishna are the highest.

What is Yoga?

योगस्थः कुरु कर्माणि संगं त्यक्त्वा धनन्जय।
सिध्यसिध्योः समो भूत्वा समत्वं योग उच्यते॥ 

Remaining steadfast in yoga, oh Dhananjaya (Arjuna), perform actions, abandoning attachment, remaining the same to success and failure alike. This evenness of mind is called yoga.