The sun rises in the East, so (the )East symbolises a new day, newness, and birth.
Some one has told me'The East' is a place, "East" is a direction. Either would be okay here, but he chose east (direction) to match the 'eastern window' in the poem - they look east.
Here's a stanza from the poem;
Ye open the eastern windows, That look towards the sun, Where thoughts are singing swallows And the brooks of morning run.
Thanks a million in advance.
It you are confused about it don't write the word "East" for the second time. It'll be better to replace it with "it"
The Sun rises in the East, so it symbolises a new day, the beginning of a new life... Doesn't it sound better?