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

This was the original conviction of Christianity. And if we go back to the early days of Christianity, people still expressed a conviction. They said: Now, this healing, this health-giving Spirit must work in two ways. Firstly, because nature can become ill, it must work on the physical, on that which comes from the Father-God. And because the will must also become healthy, it must act on that which comes from the Son. So they said: This Holy Spirit must work in such a way that it emanates from the Father and the Son at the same time. That was the original conviction of Christianity.