If I say “Buddha,” today most people think of Gautama the Buddha. Gautama was not the only Buddha. There were many before him, many at that time, and many more after him. Buddha is not his name. His name was Gautama Siddhartha. He became a Buddha. The word "Bu" means buddhi or the intellect. One who is above his intellect is a Buddha. There is probably no one in the world who has not heard of Gautama's name. Though there have been many Buddhas, his name has lived on. He has been one of the greatest spiritual waves and probably the most successful spiritual teacher on the planet. In his own lifetime, he had forty thousand monks and this army of monks went out to bring a spiritual wave. He did not do anything very new as such, but he offered spirituality to society in the way that it works. Till then, the spiritual process was offered only in the Sanskrit language in that part of the world and Sanskrit was available only to a certain community of people. Others were barred from learning it because this language was seen as the key to the Divine. For the first time, Gautama spoke in Pali, which was the common language of the day. He opened up the floodgates of spirituality for all kinds of people. - Sadhguru.