I have heard that on one occasion the Blessed One was staying in Savatthi, at the Eastern Gatehouse. There he addressed Ven. Shariputra: "Shariputra, do you take it on conviction that the faculty of conviction, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation? Do you take it on conviction that the faculty of persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation?"
"Lord, it's not that I take it on conviction in the Blessed One that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation. Those who have not known, seen, penetrated, realized, or attained it by means of discernment would have to take it on conviction in others that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation; whereas those who have known, seen, penetrated, realized, and attained it by means of discernment would have no doubt or uncertainty that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation. And as for me, I have known, seen, penetrated, realized, and attained it by means of discernment. I have no doubt or uncertainty that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation."
"Excellent, Shariputra. Excellent. Those who have not known, seen, penetrated, realized, or attained it by means of discernment would have to take it on conviction in others that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation; whereas those who have known, seen, penetrated, realized, and attained it by means of discernment would have no doubt or uncertainty that the faculty of conviction... persistence... mindfulness... concentration... discernment, when developed and pursued, plunges into the Deathless, has the Deathless as its goal and consummation."