Mímir is a figure from Norse mythology known for his wisdom and knowledge. He is often associated with a well, called Mímisbrunnr, located beneath one of the roots of the world tree Yggdrasil. This well is said to contain water that grants immense wisdom to those who drink from it. In the myths, Odin, the chief god, sacrifices one of his eyes to gain access to Mímir's well and its profound knowledge. Mímir himself is sometimes depicted as a wise being who provides counsel and insight, playing a crucial role in the understanding of fate and the cosmos in Norse beliefs.