Muhammad had developed a refined integrated understanding, an intuitive capacity to connect to what has been referred to throughout our religious history as God/Truth/Knowledge/Love. As a result of this, far from what we think of as a vocation or choice, Muhammad understood the duty and function of his life. Jesus, Muhammad and other prophets – many of whom are referred to in the Qur'an – along with Islamic Sufi teachers who would come after Muhammad, are examples of human beings who reached a permanent stage where they were able to maintain existence in two worlds. They were "in the world but not of the world" (The Prophet).