وبالجملة هو أشرف العلوم، لكونه أساس الأحكام الشرعية، ورئيس العلوم الدينية
In summary, kalām is called an eminent science because it underlies religious rulings and holds a foundational place among the religious disciplines.
Kalām is regarded as foundational among the religious sciences because commitment to worship and legal duties presupposes convictions about God, prophethood, and the truth of revelation. Once the authority of those foundations is affirmed, legal details can be studied within their appropriate discipline.
Foundations and branches: The units and conditions of prayer are studied in fiqh. Accepting prayer as divinely prescribed, however, is connected with the authority of God, His Messenger, and revelation.
Calling one discipline “foundational” does not render other sciences unnecessary. Each remains important according to its subject and purpose; the designation identifies the relationship between basic commitments and their further consequences.