The sections of Tawhid and the Monotheists - Muhammad bin Sarrar Al-Yami

The monotheism relates to the noblest self, and the most complete attribute of God, the Living, the Sustainer; therefore, the knowledge of monotheism is the noblest of sciences, both a subject and an object of knowledge, and the realization of monotheism is the noblest of deeds absolutely, and it is the call of all prophets. The most important thing for the servant to know is monotheism. The known of the science of monotheism is what Allah legally intends, and Allah's intention gathers three matters: He gathers that Allah the Almighty desired it, loved it, and commanded it. Three matters are derived from this: because Allah commanded it, He rewards its doer, punishes its neglecter, and forbids its violation; because commanding something is a prohibition of its opposite, so the command for monotheism is a prohibition of shirk, and it is necessary.