Dr. Sarvepalli Radhakrishnan, the first vice-president and second president of Independent India, was also one of its foremost thinkers and visionaries. He was also known widely as a teacher, which is why his birth anniversary is celebrated every year as Teachers' Day. He believed that teachers must be accorded the highest honour, since their role in nation-building is very crucial. He has written several books, of which Bhagvadgita is the best-loved.