It is one of the characteristics of the believers, so what do you think of the learned among the believers? If trust is only due to the scholar because he is a believer, just as God has restricted him to it, and He has not restricted it in vain. If it were one of the attributes of the learned and theoretical knowledge requires it, he would not have restricted it to faith, so trust does not fall in the form of participation by a non-believer in any Sharia. The reason for this was that God Almighty does not obligate anything to him rationally except what He has made obligatory upon Himself, so He accepts it as faith, not as knowledge, for He does what He wills. Then when He guaranteed what He guaranteed, He declared that He would do something.