परोपदेशवेलायां शिष्टा: सर्वे भवन्ति वै |
विस्मरन्तीह शिष्टत्वं स्वकार्ये समुपस्थिते ||
paropadeśa-velāyāṁ śiṣṭāḥ sarve bhavanti vai |
vismarantīha śiṣṭatvaṁ svakārye samupasthite ||
(Mahābhārata)
“At the time of giving advice to others, everyone is certainly wise [alt., cultured, proper, etc., or so they think]. When their own duty [alt., tasks, responsibility, difficulty, etc.] arises [however] they then forget all their wisdom [alt., culturedness, propriety, etc.].”