The movement of The Poor was able to survive the Middle Ages because it never closed itself with a sectarian spirit (that is, it did not see itself as an exclusive group, spiritually superior to other Christians); rather, it knew how to continuously renew itself spiritually and theologically. This was possible because, though their social structure and their way of life might change, from their time of origin the Waldensians had a clear and original message to which they held firmly, and to which