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How shall I, ever meditating, know Thee, O Yogin? In what aspects or things, O blessed Lord, art Thou to be thought of by me?

How may I know you, yogin, as I constantly meditate on you? In which things, Lord, should I think of you?

Arjuna's question is practical. He wants to keep Krishna always in mind, but the mind needs something to rest on. In which forms, in which aspects of the world, should he think of the divine? He calls Krishna yogin, the master of yoga, which links back to the power of yoga Krishna mentioned earlier in the chapter. The repeated phrase in which and which shows his eagerness for many particular examples. The verse explains the purpose of the long list that follows: it is meant as a set of supports for remembrance, not as a catalogue for its own sake.