Rationalistic in the context of "Deistic"

Deism (/ˈdiːɪzəm/ DEE-iz-əm  or /ˈdeɪ.ɪzəm/ DAY-iz-əm; derived from the Latin term deus, meaning "god") is the philosophical position and rationalistic theology that generally rejects revelation as a source of divine knowledge and asserts that empirical reason and observation of the natural world are exclusively logical, reliable, and sufficient to determine the existence of a Supreme Being as the creator of the universe. More simply stated, Deism is the belief in the existence of God—often, but not necessarily, an impersonal and incomprehensible God who does not intervene in the universe after creating it, solely based on rational thought without any reliance on revealed religions or religious authority. Deism emphasizes the concept of natural theology—that is, God's existence is revealed through nature.

Since the 17th century and during the Age of Enlightenment, especially in 18th-century England, France, and North America, various Western philosophers and theologians formulated a critical rejection of the several religious texts belonging to the many organized religions, and began to appeal only to truths that they felt could be established by reason as the exclusive source of divine knowledge. Such philosophers and theologians were called "Deists", and the philosophical/theological position they advocated is called "Deism".

Liberalism and progressivism within Islam or simply Islamic liberalism or Islamic progressivism are a range of interpretation of Islamic understanding and practice, it is a religiously left-leaning view, similar to Christian and other religious progressivism. Some Muslims have created a considerable body of progressive interpretation of Islamic understanding and practice. Their work is sometimes characterized as progressive (Arabic: الإسلام التقدمي al-Islām at-taqaddumī) or liberal Islam. Some scholars, such as Omid Safi, differentiate between "progressive Muslims" (post-colonial, anti-imperialist, and critical of modernity and the West) versus "liberal advocates of Islam" (an older movement embracing modernity). Liberal Islam originally emerged from the Islamic revivalist movement of the 18th–19th centuries. Leftist ideas are considered controversial by some traditional fundamentalist Muslims, who criticize liberal Muslims on the grounds of being too Western and/or rationalistic.

The methodologies of liberal and progressive Islam rest on the re-interpretation of traditional Islamic sacred scriptures (the Quran) and other texts (the Hadith), a process called ijtihad. This reinterpreting can vary from minor to fundamental, including re-interpretation based on the belief that while the meaning of the Quran is a revelation, its expression in words is the work of the Islamic prophet Muhammad in his particular time and context.