The Preceptor is the helmsman, and Knowledge is the Boat. After having got that Boat, one becomes successful. Indeed, having crossed the Ocean, one may renounce both.
प्लावयिता तस्य ज्ञानं प्लव इहोच्यते। विज्ञाय कृतकृत्यस्तु तीर्णस्तदुभयं त्यजेत्॥