What a beautiful poem. Just the thought of a dream folded on a branch that one could possibly reach out is by itself fascinating and soul reviving.
This "Grove" seems more like the field we all need to spend some time around, a place that could be in nature itself or in one's mind/heart, a source of peace and energy.
The 2nd stanza took me to a different phase, that falls under the same mood, magical and vibrant.
Stressing on the unbreakable bond between words and inspiration and linking between enlightenment and the well of memories is just so deep.
An amazing poem, loved it to the last word; I could imagine everything you penned down.
On a side note, regarding the use of "An enlighten pen speaks" - enlighten itself is a verb, you might need to replace it with a noun form, "enlightening pen, enlightener pen, enlightenment pen". Any of these could do the job.