Evolution is not explicitly mentioned in the Tipitaka. As no major principles of Buddhism contradict it, many Buddhists tacitly accept the theory of evolution. Questions about the eternity or infinity of the universe at large are counted among the 14 unanswerable questions which the Buddha maintained were counterproductive areas of speculation. As such, many Buddhists do not think about these kinds of questions as meaningful for the Buddhist goal of relieving oneself and others from suffering. One does not need to know the origin of life, nor agree with the Buddha's position on scientific topics, in order to achieve enlightenment.