As for the individual who has neither serenity nor discernment: they should approach someone who has serenity and discernment and ask: ‘Reverend, how should the mind be stilled? How should it be settled? How should it be unified? How should it be immersed in samādhi?’ How should conditions be seen? How should they be comprehended? How should they be discerned?’ They would answer as they’ve seen and known: ‘Reverend, this is how the mind should be stilled, settled, unified, and immersed in samādhi. And this is how conditions should be seen, comprehended, and discerned.’ After some time they have both serenity and discernment.
As for the individual who has both serenity and discernment: grounded on those skillful qualities, they should practice meditation further to end the defilements. These are the four individuals found in the world.”
Numbered Discourses 4.95 10. Titans A Firebrand
“Mendicants, these four individuals are found in the world. What four? One who practices to benefit neither themselves nor others; one who practices to benefit others, but not themselves; one who practices to benefit themselves, but not others; and one who practices to benefit both themselves and others.