By knowing you one can avoid both death and rebirth. You are the highest object of knowledge. By knowing you no higher object remains for one to know.
यं ज्ञात्वा न पुनर्जन्म मरणं चापि विद्यते। यं विदित्वा परं वेद्यं वेदितव्यं न विद्यते॥