An excerpt from a letter of the Previous Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn:
A great intellectual who relies on his own intellect is more susceptible to error than an individual who does everything because of the yoke of Heaven, without his own reasoning.
This was the mistake of King Shaul, who followed his mind. Concerning this, the prophet Shmuel scolded him saying (I Shmuel, 15:22): “to obey is better than a peace-offering.”
It is for this reason that in truth, simple people, who do the commandments of G-d with simplistic faith and the acceptance of the yoke of Heaven, are in truth greater than those thinkers that rely on their minds. For they generally are mistaken in their understanding and to not grasp G-d’s true intent.
(Igros Kodesh, Previous Lubavitcher Rebbe, Vol. 2 Pg. 336)
