While the revealed teachings are often known as secondary and supporter in philosophy, they are regarded as such necessary grounds in transcendental philosophy that the most attention has to be throughout philosophical studies. The transcendental philosopher, when putting the problem forward, presenting proofs and taking appropriate method, all, owes to the verses and traditions, and when lacking attention to revealed teachings, his philosophy fails to explain the world of creation. This paper has intended to show that Sadra, as a Muslim philosopher, is necessitated to use Divine teachings to explain human nature.