The mind is the most valuable faculty that Allah (swt) has endowed man with and it bears different degrees and classifications.

1- Theoretical intellect: Whose job is to know about realities and judge about them.

2- Practical intellect: Controlling man’s actions is the responsibility of this subdivision of the mind; it distinguishes between the do’s and don’ts and in reality, is the basis of all sciences related to life and living. In other words, the question it is always answering is whether something should be done or not.

Since the mind is a phenomenon, as is with all other phenomena, it is limited, therefore its scope is also limited and one can't expect the unlimited from it. Therefore, the most it is capable of is learning of creation and knowing God limitedly, without being able to completely know God, who is unlimited.

The mind can have endeavors both in tashri’i and takwini fields and learn more of them, nevertheless, it isn't totally needless of revelation in either one. For instance, when it comes to the details of resurrection (which has to do with takwin), or the reasons behind Islamic rulings (an example for tashri), the mind comes short and is in need of revelation.