From this verse onward, Krishna shifts to practical instruction. The qualities of the ideal yogi have been described — now comes the method. The yogi should find a secluded place, sit alone, keep mind and body in check, and practise constantly. Two conditions are non-negotiable: no expectations and no hoarding.
Expectation and accumulation are the two things that scatter the mind most effectively. As long as the mind is running calculations — 'What will I get? How much can I store?' — concentration remains out of reach. A vessel already full cannot receive anything new.
Solitude here is not loneliness. It is a deliberate choice to remove external noise so the inner signal becomes audible. The way a radio is tuned in a quiet room, meditation works best when the surroundings cooperate with silence.