The Druids taught the people of Britain and Gaul concerning the immortality of the soul. They believed in transmigration and apparently in reincarnation. They borrowed in one life, promising to pay back in the next. They believed in a purgatorial type of hell where they would be purged of their sins, afterward passing on to the happiness of unity with the gods. The Druids taught that all men would be saved, but that some must return to earth many times to learn the lessons of human life and to overcome the inherent evil of their own natures.