स्वप्ननिद्राज्ञानालम्बनं वा ॥३८॥
svapna-nidra-ajgyaanaa-lumbanam vaa ॥38॥
Swami Prabhavananda interprets this aphorism as, ‘The mind of a yogi can concentrate upon any object of any size, from the atomic to the infinitely great.’ Concentration is not studying an object as in a science, nor observing it, nor even the experience of it – all of which are accessed through the sensory world. It is more like what William Blake has in mind in this verse:
To see a world in a grain of sand,
And a heaven in a wild flower,
Hold infinity in the palm of your hand
And eternity in an hour.