यथा खनन् खनित्रेण नरो वार्यधिगच्छति । तथा गुरुगतां विद्यां शुश्रूषुरधिगच्छति ॥ २१८ ॥
As the man who digs with a spade (into the ground) obtains water, even so an obedient (pupil) obtains the knowledge which lies (hidden) in his teacher.
english translation