‘पितृवशेते नित्यं गुणान्तरम व्रजति शिल्पमधातुहु जालिमं समवृष्टुक्तौ मुक्ताफलहम् पयोदस्य '

The skill of a teacher imparted to a worthy pupil attains greater excellence, as the water of a cloud is turned into a pearl in a sea-shell.