A poison Tree

Klaus Michaelson made an allusion to this poem by William Blake on TV series "The originals" and I couldn't contain the excitement in me to share it with a larger audience.

I was angry with my friend:
I told my wrath, my wrath did end.
I was angry with my foe: 
I told it not, my wrath did grow. 

And I water’d it in fears,
Night and morning with my tears;
And I sunned it with smiles, 
And with soft deceitful wiles.  

And it grew both day and night,
Till it bore an apple bright; 
And my foe beheld it shine, 
And he knew that it was mine,  

And into my garden stole 
When the night had veil’d the pole:
In the morning glad I see
My foe outstretch’d beneath the tree.

-  1794  (From The Poetical Works of William Blake.  Ed. With an Introduction and Textual Notes by John Sampson.  Oxford UP, 1913)