"Root up and branches down is this ancient asvattha tree, that (its source) is pure. That is Brahman and that alone is called immortal. On that, do all worlds depend and none passes beyond that. This verily is that.".
Katha Upanishad 2.3.1
Dwarapalakas are souls that are responsible for helping you "start" climb the tree and hence set up to verify your purity.
So, if Everything is Brahman what then is impurity and why is it not allowed up the tree? Ponder!
The Truth.
The above message is written without any comprehension and defies logic.
I agree with Mr Prasad. If everything is Brahman, then the dwarapalakas are also Brahman. Why should they help me climb the tree which is also Brahman.
It is this kind of blabbering messages that give bad name to our scriptures.