उत्तररामचरित - प्राज्ञजडयोः भेदः

वितरति गुरुः प्राज्ञे विद्यां यथैव तथा जडे
    न तु खलु तयोर्ज्ञाने शक्तिं करोत्यपहन्ति वा ।
भवति हि पुनर्भूयान् भेदः फलं प्रति तद्यथा
    प्रभवति शुचिर्बिंबग्राहे मणिर्न मृदादयः ॥

- उत्तररामचरित

vitarati guruH prAjne vidyAM yathaiva tathA jaDe
    na tu khalu tayoH jnAne shakti karoti apahanti vA ।
bhavati hi punaH bhUyAn bhedaH phalaM prati tad yathA
    prabhavati shuchiH bimbagrAhe mRut AdayaH ॥

- uttararAmacharita

A teacher teaches his lessons to a intelligent student just like he does to a dull one. The lessons themselves do not have the ability to make or break one's fortune. However we see a big difference in the way the same lessons impact either students. It is the same difference we see in the ability to reflect radiance between a gem (crystal) and mud.

- Uttararamacharita