These are some important questions about Islamic Doctrine which I have answered, mentioning the proof-texts from the Qur’an and correct and authenticated Ahadith (true sayings and traditions of the Prophet, may peace and blessings be upon him) so that the reader may be satisfied with the correctness of the answers, since the Doctrine of Allah’s Tauhid (monotheism, oneness) is the foundation of man’s happiness in this world and the hereafter.