Throughout the Quran there are numerous verses enjoining the reader to observe and reflect on the universe and the phenomena of nature. A verse in chapter 3 says:

There are signs in the creation of the heavens and the earth, and in the alternation of night and day for people of understanding. (Quran 3:191)

This is because the Quran wants people to discover God through study and contemplation. God should be an intellectual discovery for believers.

God wants that people should stand on self-discovered faith and does not want faith to be imposed upon them. He has given intelligence to human beings so that they can evaluate and make a self-discovery of the truth. The spirit of enquiry is essential for this self-discovery.

Source: The Seeker’s Guide