i'm not very sure it's prudent if you're indicating your own incorruptibility as a poet to put it in the future tense in the first place, and when you continue as pope does ‘envy must own, i live among the great’ as he starts to describe his own life and you realise he's bringing in touches about himself which really have very little to do with the particular role as poet, it becomes quite clear that that depersonalisation process has not taken place in the case of pope.