|Chapter 2: Contents of the Gita Summarized|
nasti buddhir ayuktasya
na cayuktasya bhavana
na cabhavayatah santir
asantasya kutah sukham
One who is not connected with the Supreme [in Krishna consciousness] can have neither transcendental intelligence nor a steady mind, without which there is no possibility of peace. And how can there be any happiness without peace?
The nature of the jiva or the soul is that it is always controlled. Either by Krishna's internal (spiritual) energy or His external (material) energy. The choice is entirely upto the living entity, but once he decides then he is helpless in the manner that these energies exercise their respective control. Krishna now strenghtens his argument by presenting the contrast. In the past two verses He was describing the position of one who is transcendentally situated under Krishna's internal energy. In the next two verses He describes the position of one who chooses to be situated under His external energy. For one who has not controlled the mind, there is no intelligence fixed on the soul. For one who not having such fixes intellegence arising from controlled mind, meditation on the Supreme Lord is not possible. Not performing meditation, he does not have peace, the cessation of agitation from sense objects. This peaceless person will not have bliss from the soul. Srila Prabhupada comments, "Therefore, one who is engaged without a relationship with Krishna is certainly always in distress and is without peace, however much he may make a show of peace and spiritual advancement in life. Krishna"
Please read the Sanskrit Verse and the Prabhupada's Purport.