Bhagavad Gita -Swami Sivananda
Chapter-6 : THE YOGA OF MEDITATION
Summary of Sixth Discourse
The practice of Brahmacharya is absolutely necessary if one is to succeed in meditation. The conservation and transformation of the vital fluid into spiritual energy gives immense power of concentration. Fearlessness, too, is an essential quality on the Godward path. It is faith in the sustaining protection and Grace of God.
The aspirant is advised to practise moderation in his daily habits—in eating, sleeping, recreation, etc. Extremes are to be avoided as they hinder the practice of meditation. Living a life of such moderation, and gathering up all his forces and directing them towards meditation upon the Atman, the aspirant gradually transcends the senses and intellect and merges himself in the blissful Atman. He finds that the bliss of the Atman is incomparable, that there is no gain greater than the Self. Having thus attained perfect union with the Self, the Yogi no more descends into ignorance or delusion. He does not relish any more the pleasures of the senses.
Lord Krishna again emphasises that the concentration of the mind on the Atman should be like a steady flame in a windless place. This ultimately leads to the vision of the Lord in all beings and creatures. Arjuna is doubtful whether it is at all possible to engage the mind steadily on the higher Self, as its very nature seems to be one of restlessness. Krishna assures him that the practice can succeed through Vairagya (dispassion) and constant effort.