Abhibhāyatanasutta
“Aṭṭhimāni, bhikkhave, abhibhāyatanāni. Katamāni aṭṭha? Ajjhattaṁ rūpasaññī eko bahiddhā rūpāni passati parittāni suvaṇṇadubbaṇṇāni. ‘Tāni abhibhuyya jānāmi passāmī’ti, evaṁsaññī hoti. Idaṁ paṭhamaṁ abhibhāyatanaṁ.
Dimensions of Mastery
“Mendicants, there are these eight dimensions of mastery. What eight? Perceiving form internally, someone sees forms externally, limited, both pretty and ugly. Mastering them, they perceive: ‘I know and see.’ This is the first dimension of mastery.