Progress is not the aim, but circulation

Approach to the poem must be from afar off, even generations off. A reader should close in on it on converging lines from many directions like the divisions of an army upon a battlefield. A poem is best read in the light of all the other poems ever written. We read A the better to read B (we have to start somewhere; we may get very little out of A). We read B the better to read C, C the better to read D, D the better to go back and get something more out of A. Progress is not the aim, but circulation. The thing is to get among the poems where they hold each other apart in their places as the stars do. - Robert Frost