The issue of science is one of the most fundamental issues of philosophy that has made many thinkers think about truth and its quality. The concept of science, which is the absolute meaning of knowledge and awareness, is an obvious concept, but the approach of Islamic scholars to its truth is different. Some have considered it a negative thing, some have considered it as a form in the intellect and some have considered it as an additional category. Mulla Sadra considers the truth of science as an existential thing and with this approach he excludes science from the scope of essential concepts.