Islam's most fundamental concept is a strict monotheism called tawḥīd. God is described in the Quran as: "Say: He is God, the One; God, the Eternal, the Absolute; He begot no one, nor is He begotten; Nor is there to Him equivalent anyone."[20][21] Muslims deny the Christian doctrine of the Trinity and divinity of Jesus, comparing it to polytheism. In Islam, God is beyond all comprehension or equal and does not resemble any of his creations in any way.