54. Sense desire is an obstruction, a hindrance which enshrouds the mind and weakens wisdom. Ill-will, sloth and torpor, restlessness and worry and doubt are all obstructions, hindrances which enshroud the mind and weaken wisdom. Surely it is possible that one, after abandoning these obstructions and hindrances which grow in and up over the mind and weaken wisdom, being strong in wisdom, should know his own good, the good of others, the good of both, and attain that knowledge and vision befitting the Noble Ones and transcending human states.
Anguttara Nikaya III.63
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