Yoga as Body and Mind Control
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can see that in modern civilization it is indeed very difficult to execute this meditational form of  yoga  properly. Contemporary civilization in this age of Kali has actually made it impossible for us to be alone, to be desireless and to be possessionless.
The method of executing meditational  yoga  is further explained in considerable detail by Kṛṣṇa to Arjuna. Śrī Kṛṣṇa says:
śucau deśe pratiṣṭhāpya 
    sthiram āsanam ātmanaḥ 
    nāty-ucchritam nātinīcam 
    cailājina-kuśottaram 
    tatraikāgram manaḥ kṛtvā 
    yata-cittendriya-kriyaḥ 
    upaviśyāsane yuñjyād 
    yogam ātma-viśuddhaye
“To practice  yoga , one should go to a secluded place and should lay  kuśa  grass on the ground and then cover it with a deerskin and a soft cloth. The seat should neither be too high nor too low and should be situated in a sacred place. The  yogī  should then sit on it very firmly and should practice  yoga  by controlling the mind and the senses, purifying the heart and fixing the mind on one point.” (Bg. 6. 11-12) Generally  yogīs  sit on tigerskin or deerskin because reptiles will not crawl on such skins to disturb their meditations. It seems that in God’s creation there is a use for everything. Every grass and herb has its use and serves some function, although we may not know what it is. So in  Bhagavad-gītā  Kṛṣṇa has made some provision whereby the