Francis of Assisi (1181 – 1226 CE), later San Francisco in Spanish, wanted to join the crusades to help convert Muslims to Christianity, but after spending time at a Sultan’s Court, came back with a very Sufi-like vision of the brotherhood of all of humanity: All religion is one brotherhood in God, give all to the poor, and contemplate all through radical love. At the end of time, he said, we will be standing side by side, hand in hand with sister death and brother fire.
Some in Francis’ day thought that he was the second coming of Jesus, though the Catholic Church squashed this heretical movement but compromised with it by making Francis a saint.
Thought Itself 