महाभारत - उद्योग - विद्या

आचार्यात् पादमादत्ते पादं शिष्यः स्वमेधया ।
कालेन पादमादत्ते पादं सब्रह्मचारिभिः ॥

- महाभारत, उद्योग

A student gets one quarter of his education from his teacher. Another quarter by contemplation. Another quarter is learned over time by experience. The last quarter is learned from the fellow students.

-Mahabharata, Udyoga