This was said by the Blessed One, said by the Arahant, so I have heard: “Monks, I don’t envision even one other hindrance–hindered by which people go wandering & transmigrating on for a long, long time–like the hindrance of ignorance. Hindered by the hindrance of ignorance, people go wandering & transmigrating on for a long, long time.”
No one other thing so hinders people that they wander on, day & night, as when they’re obstructed by delusion. But those who, letting go of delusion, shatter the mass of darkness, wander no further. Their cause isn’t found.
https://www.dhammatalks.org/suttas/KN/Iti/iti14.html
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