In the Qur’an, people are summoned to contemplate numerous events and objects that clearly testify to the existence and uniqueness of Allah and His attributes. In the Qur’an, all these beings that bear witness are designated as "signs", meaning "tested evidence, absolute knowledge and expression of truth". Therefore, the signs of Allah comprise all the beings in the universe that disclose and communicate the being and attributes of Allah. Those who can observe and remember will see that the entire universe is only composed of the signs of Allah.