The Buddha (also known as Siddhattha Gotama or Siddhārtha Gautama) was a philosopher, mendicant, meditator, spiritual teacher, and religious leader who lived in Ancient India (c. 5th to 4th century BCE). He is revered as the founder of the world religion of Buddhism. He taught for around 45 years and built a large following, both monastic and lay. His teaching is based on his insight into duḥkha (typically translated as "suffering") and the end of dukkha – the state called Nibbāna or Nirvana.
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And this is the simple truth — that to live is to feel oneself lost. He who accepts it has already begun to find himself, to be on firm ground. Instinctively, as do the shipwrecked, he will look around for something to which to cling, and that tragic, ruthless glance, absolutely sincere, because it is a question of his salvation, will cause him to bring order into the chaos of his life. These are the only genuine ideas; the ideas of the shipwrecked. All the rest is rhetoric, posturing, farce.