Islam (“submission”) teaches that there is one God (Allah), and that Muhammad is the final prophet in the Abrahamic line beginning with Abraham. Its central affirmation is tawhid — the absolute oneness of God — and its practice is structured by the five-pillars: witness, prayer, almsgiving, fasting, and pilgrimage.
The qurán is understood as the literal speech of God through Muhammad; the hadith preserve the prophet’s sayings and example. Islamic law (sharia) and theology (kalam) systematize the outer path.
Islam’s inner dimension is Sufism, which reads the Qur’an and the life of the Prophet as a map of the heart’s journey home to God.