It is possible to read the narrator as a divine figure who uses the tree to seduce mankind into disgrace. The speaker seems ok about this but is there some doubt about the destructiveness of his anger? Tempted, the enemy, in the dead of night, when both are at extremes in their relationship poles aparttakes the forbidden fruit, eats it and dies.
The speaker's growing antipathy was masked by smiles and pretence. This powerful and curious little poem is about the power of anger to become corrupted into something far more deadly and devious if it is not aired honestly.
One possible interpretation is as follows: Blake is saying that repressing our righteous anger makes us scheme into finding underhand ways to get back at our enemies, and — consciously or unconsciously — we end up setting traps for our enemies in order to bring them down.
Through ingestion, the poisoned sense of reason of the poisoner is forced onto the poisoned. Look for this in lines 1,3,5,6,7,8,9,10,11,12,13,14, The revolutionary forces were commonly connected to the anger with opposing she's that the anger was either a motivating rationale or simply blinded an individual to reason.
The Serpent is the speaker, both tempting and deceitful.