Can someone help me with the interpretation of an edgar allan poe poem? "Imitation"?

I think the poet is saying that "imitation" was how he started out...imitating the work of others that had come before...before he was alive, but also before his youth and innocence were gone. However, he doesn't regret that time because he wouldn't be who he is today if it weren't for the stories and visions of those who came before him and helped him get better by allowing him to imitate...and when that time of youth was past, when his worldly "rest" had past, it went with a sigh...and he doesn't care that it's gone, even though at the time he cherished the moment. He says, "let none of earth inherit that vision of my spirit"...in other words, if he had not imitated the great and allowed their works to p him by, then no one would inherit his vision either...or if they said he shouldn't have, then they shouldn't be allowed to either.