[446] And how does a bhikkhu dwell contemplating the mind in the mind (citta) externally?
Here a bhikkhu, when that person's mind is with lust (rāga), understands: "His mind is with lust"; or when that person's mind is without lust, he understands: "His mind is without lust." When that person's mind is with hatred (dosa), he understands: "His mind is with hatred"; or when that person's mind is without hatred, he understands: "His mind is without hatred." When that person's mind is with delusion (moha), he understands: "His mind is with delusion"; or when that person's mind is without delusion, he understands: "His mind is without delusion." When that person's mind is contracted (saṅkhitta), he understands: "His mind is contracted"; or when that person's mind is distracted (vikkhitta), he understands: "His mind is distracted." When that person's mind is exalted (mahaggata), he understands: "His mind is exalted"; or when that person's mind is unexalted (amahaggata), he understands: "His mind is unexalted." When that person's mind is surpassable (sa-uttara), he understands: "His mind is surpassable"; or when that person's mind is unsurpassable (anuttara), he understands: "His mind is unsurpassable." When that person's mind is concentrated (samāhita), he understands: "His mind is concentrated"; or when that person's mind is unconcentrated (asamāhita), he understands: "His mind is unconcentrated." When that person's mind is liberated (vimutta), he understands: "His mind is liberated"; or when that person's mind is not liberated (avimutta), he understands: "His mind is not liberated."
He cultivates that sign (nimitta), develops it, makes much of it, and defines it well. Having cultivated that sign, developed it, made much of it, and defined it well, he directs the mind to the mind both internally and externally.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.