Samyuktagama (Sanskrit fragments) 267.5

267.5

「諸比丘！當善思惟觀察於心。所以者何？長夜心為貪欲所染，瞋恚、愚癡所染故。比丘！心惱故眾生惱，心淨故眾生淨。比丘！我不見一色種種如斑色鳥，心復過是。所以者何？彼畜生心種種故，色種種。

“Monks, one should contemplate and observe the mind well. Why is that? Because the mind has been affected by greed … hatred … affected by delusion for a long night. Monks, sentient beings are troubled because their minds are troubled, and sentient beings are purified because their minds are purified. Monks, I don’t see a single form as varied as that of a multi-colored bird, but its mind goes beyond that. Why is that? That animal’s form is diverse because its mind is diverse.