The Trinity — The three forms of Christianity and Islam — The Crusades

We must now only properly understand what this actually means in world history, that Muhammad proclaimed the principle: There is only one God. Why then was this so strongly emphasized by Mohammed? Mohammed was already familiar with Christianity; and Christianity does not have three gods, but it does have three divine figures. You just don't feel that anymore today. You don't feel today that Christianity did not have three gods from the beginning, but it has three divine figures: Father, Son and the so-called Holy Spirit.