Obstructions
Āvaraṇatā Sutta  (AN 6:86)

“Endowed with these six qualities, a person is incapable of alighting on the lawfulness, the rightness of skillful qualities even when listening to the true Dhamma. Which six?

“He is endowed with a (present) kamma obstruction, a defilement obstruction, a result-of-(past)-kamma obstruction; he lacks conviction, has no desire (to listen), and has dull discernment.

“Endowed with these six qualities, a person is incapable of alighting on the lawfulness, the rightness of skillful qualities even when listening to the true Dhamma.

“Endowed with these six qualities, a person is capable of alighting on the lawfulness, the rightness of skillful qualities even while listening to the true Dhamma. Which six?

“He is not endowed with a (present) kamma obstruction, a defilement obstruction, or a result-of-(past)-kamma obstruction; he has conviction, has the desire (to listen), and is discerning.

“Endowed with these six qualities, a person is capable of alighting on the lawfulness, the rightness of skillful qualities even while listening to the true Dhamma.

See also: AN 5:202; Thag 5:10