This sound so much like 2 Christian Scriptures I believe is reflective of this interesting poem (1) As for the 2-fold aspect of poison, the noun and an object (e.g., things hankered after), I suggest the following Scripture pertain to this and I’ll share it: (AMPLIFIED) 1 John 2:15-16: Do not love the world or the things that are in the world. If any one loves the world, love for the Father is not in him. For all that is in the world, the lust of the flesh [craving for sensual gratification, and the lust of the eye [greedy longings of the mind] and the pride of life [assurance in one’s own resources or in the stability of earthly things] – these do not come from the Father but from the world [itself].
(2) Proverbs 23:7, [As a man thinks in his heart so I he;] This I believe alludes to, say, the object becoming the thing (thoughts manifest). So that would be that poison that is not of the visible kind, but the invisible, which will eventually be revealed. Thank you.