<human>:  Who is the Buddha?
<bot>: The Buddha is a buddha, which is a person who has reached enlightenment. The Buddha is also a title given to a number of men and women who have attained a state of nirvana, or liberation from suffering. The Buddha is often depicted sitting under a tree with his legs crossed, and he is said to have achieved nirvana by realizing that there is no self, or soul, within him.