"The whole object of the Prophets and the Sages was to declare that a limit is set to human reason where it must halt"

Maimonides is recommending that the objective of prophets and sages was to communicate that there are particular restrictions to human factor. There are specific subjects, mysteries or complexities of life that can not be totally grasped or comprehended through reason alone. For that reason, one must look for answers via confidence, intuition, approval of the unidentified, and embrace the idea that some points are beyond human comprehension.