para-vācyeṣu nipuṇaḥ
para-vācyeṣu nipuṇaḥ sarvo bhavati sarvadā |
ātma-vācyaṁ na jānīte jānann api ca muhmati ||
(Unknown source)
“Everyone is always expert in regard to the faults of others [alt., in commenting on or criticizing others]. They are unaware [however] of their own faults, or, even if they are aware, they are mistaken [about them, as they don’t know how to analyze themselves properly].”