I keep, and pass, and turn again.
Far or forgot to me is near;
Shadow and sunlight are the same;
The vanished gods to me appear;
And one to me are shame and fame.
They reckon ill who leave me out;
When me they fly, I am the wings;
I am the doubter and the doubt;
And I the hymn the Brahmin sings.
The strong gods pine for my abode,
And pine in vain the sacred Seven,
But thou, meek lover of the good!
Find me, and turn thy back on heaven.
If you find Brahma (here, one may posit the name of whatever deity in which they believe), you’re pretty much set, right? Then why would he say to turn his back on heaven? 
 Consider this; why practice religion? To attain heaven, yes? To gain entrance to something better? But then, that would make practicing religion (something Emerson didn’t much like, as Emerson condemned all institutions) for the self, and not for God. Instead, if you attempt to find God in your own way, then you are really doing it for God, not for your own salvation. 
 For that reason, then, turn your back on heaven, and look for God. Only then will you be privy to Brahma and his subtle ways.