The Blackfoot tribes were known as the fiercest warriors in battle, and also known as the most refined and beautifully adorned in North America. Lewis and Clark were the first explorers to document this. Their culture was highly organized and profoundly religious. Although they never built churches or wrote religious books, almost every part of their daily lives was bound up in their beliefs and religion. This accounted for the exceptional quality of everything they produced. They spoke of their God as the Great Spirit who was eternal and never ending. They believed he would guide their lives and destinies. And even though the days of these mystic warriors of the plains ended before the turn of the 19th century, their way of life and culture would become a permanent part of the history of America.