तदेवास्य परं मित्रं यत्र सङ्क्रामति द्वयम् ।
दृष्टे सुखं च दुःखं च प्रतिच्छायेव दर्पणे ।।
tad evāsya paraṁ mitraṁ yatra saṅkrāmati dvayam |
dṛṣṭe sukhaṁ ca duḥkhaṁ ca praticchayeva darpaṇe ||
(Subhāṣita-śataka)
“One in whom both the happiness and the distress of another appear like a reflection in a mirror upon being seen [in the other] is a great friend.”