
Samuel P. answered 08/07/19
Masters student in English and former teacher
I think you're talking about the final line of Book I of Pope's Essay on Man. In that book, he sets out to develop a cosmology of existence such that the classical idea of the Great Chain of Being can synthesize with the novel scientific developments oh his day (around 1730's I think when he was writing this). In truth, Pope may well have taken the entirety more of less of An Essay on Man from one of his friends - a person named Lord Bolingbroke. Bolingbroke had written a prose philosophical tract from a radically deistic perspective. There's a good bit of evidence that Pope used that as either a springboard for his own poem or simply gave meter and rhyme to the prose. The latter is a bit unlikely though given that so much of the poem is indebted to Classical tropes, sources, and drives (things very valuable to Pope). So as to 'Whatever is, is right' - that becomes the basis for much of the poem, which is to diagram the relationship between God, man, and creation. The line is too far-reaching to sum up, but basically creation is God's doing; God is right; so whatever is/ was/ will be created is right.