Explanation:

“Shine here to us, and thou art everywhere; 

This bed thy centre is, these walls, thy sphere.”

Answer: These are the concluding lines of “The Sun Rising’, a famous love lyric of John Donne, the leader of the Metaphysical school of poetry. 

In the morning while the sun is rising, the poet and his beloved (wife) are lying in bed. The poet is not willing to leave the bed, although the sunshine seems to invite them to get up. He wants to make more love to his beloved in this warm atmosphere of the morning. He thinks, the sun shining on them through windows, is disturbing them in their love-making. So, he chides the sun for this. He believes that he is superior to the sun, because, in possessing his beloved he possesses the whole world. She is all the kingdoms of the world taken together and the poet is all the rulers of the world taken together. The poet claims that the princes who rule over these states actually imitate him, and, compared with the glory and richness of his possession (his wife), all honour appears to be mere imitation and all wealth merely artificial. On the bed on which the poet and his beloved are lying, is the whole world in a narrow place for them and they are happier than the sun itself. Thus the poet thinks that the sun shining in their bedroom only can shine on the whole world because their bedroom is the epitome of the world.

In these lines, we can trace a beautiful metaphysical conceit. For the poet, the bedroom of the lovers constitutes the centre of the universe and the four walls, the sphere within which the sun revolves. The poet here brings a macrocosm into a microcosm and this is certainly a blend of intellect and emotion.