Srimad Bhagavad-Gita :
Chapter-7. ( Jnana-Vijnana-Yogam )
Slokam-1. ( Now hear, Arjuna, how by practicing yoga in full consciousness of Me, with mind attached to Me, you can know Me in full, free from doubt. )
Sri-bhagavan uvaca :
mayiasaktamanah partha yogam yunjan madasrayah,
asamsayam samagram mam yatha jnasyasi tat chranu.
Sri-bhagavan uvaca : Lord Krishna said;
partha mayi asaktamanah = hey arjuna! fixing your mind in me ( attaching your mind unto Me );
madasrayah = also depending Me only ( in conscious of Me );
yogam yunjan = if you prctice meditation;
yatha mam samagram = completely, as much as unto Me;
asamsayam jnasyasi = without doubt you know Me;
tat chranu = You hear about that ( hereafter ).
In this Seventh Chapter of Bhagavad-gita, the nature of consciousness is fully described.
Krishna is full in all opulences, and how He manifests such opulences is described herein.
Also, four kinds of fortunate people who become attached to Krishna, and four kinds of unfortunate people who never take to Krishna are described in this chapter.
At the end of the Sixth Chapter, it has been clearly stated that the steady concentration of the mind upon Krishna, or in other words consciousness, is the highest form of all yoga.
By concentrating one's mind upon Absolute, one is able to know the Absolute Truth completely, but not otherwise.
Impersonal brahmajyoti or localized Paramatma realization is not perfect knowledge of the Absolute Truth because it is partial.
Full and scientific knowledge is Krishna, and everything is revealed to the person in that consciousness.
In complete consciousness one knows that Krishna is ultimate knowledge beyond any doubts.
Different types of yoga are only steppingstones on the path of consciousness.
One who takes directly to consciousness automatically knows about brahmajyoti and Paramatma in full.
By practice of meditaion, one can know everything in full—namely the Absolute Truth, the living entities, the material nature, and their manifestations with paraphernalia.
One should therefore begin yoga practice as directed in the last slokam of the Sixth Chapter.
Concentration of the mind upon Paramatma the Supreme is made possible by prescribed devotional service in nine different forms, of which sravanam is the first and most important.
The Lord therefore says to Arjuna, "tat srnu," or "Hear from Me."
To be continued ....