Education is rendered noble when the spirit of service is inculcated. The service rendered must be free of the slightest trace of narrow selfishness. That is not enough. The thought of service should not be marred by the desire for something in return. You have to perform the service as you would perform an important Yajna (sacrificial ritual). As trees do not eat their fruits but offer them to be eaten by others in an attitude of detachment; as rivers, without drinking the waters they carry, quench the thirst and cool the heat from which others suffer; as cows offer their milk, produced primarily for their calves, in a spirit of generosity born of Tyaga (renunciation), to be shared by others; so too you should offer yourself to others prompted by the motive of service and without consideration of selfish interests. Only then can you justify your status as sajjana (noble men).