Yoga as Meditation on Kṛṣṇa
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there is spiritual variegatedness. The  yoga  processes are simply ways to elevate oneself to enter into that abode. Actually we belong to that abode, but, being forgetful, we are put in this material world. Just as a madman becomes crazy and is put into a lunatic asylum, so we, losing sight of our spiritual identity, become crazy and are put into this material world. Thus the material world is a sort of lunatic asylum, and we can easily notice that nothing is done very sanely here. Our real business is to get out and enter into the Kingdom of God. In  Bhagavad-gītā  Kṛṣṇa gives information of this kingdom and also gives instructions about His position and our position—of what He is and what we are. All the information necessary is set forth in  Bhagavad-gītā , and a sane man will take advantage of this knowledge.