Kabbalah Amsal 14:15: Ohr HaSekhel

And behold, the breaches in their understanding were the secrets of God. They were breaking the fence of the Torah and the commandments, losing faith when reaching the realization that true faith contradicted their false thoughts and evil imaginations. This is demonstrated when a person believes in one thing, and there is no balance in his hands to weigh and consider, namely, the faith he received in his childhood. For if he did not accept any faith, he would remain forever like an animal in human form. Nevertheless, after his intellect grows, and he investigates and examines his accepted belief, it becomes refined and well-grounded. On this, it is said [Proverbs 14:15], 'The naive believes everything, but the sensible man considers his steps.' If he consistently holds an accepted belief that is not understood according to his elevated, divine intellect, he will remain somewhat naive. Yet, as he becomes aware of some of the simplicity in his belief and gains understanding, he gradually ascends from one level to another. His intellect grows each day as he contemplates sophisticated matters that he has accepted. Subtle ideas draw him after tangible ones, and one should not suspect his disciples, followers, or teachers, as they did not reveal to him the secrets of faith in his childhood, for he was not fit for them. However, his intellectual weakness remained, and he continues to be somewhat naive. It is not fitting to blame his nurse who nursed him with her milk, for not feeding him other solid foods immediately, as it would have been much easier for her to sustain him externally than from what she was nursing him. But she intends to nurture him wisely, not to kill him with unsuitable nourishment, which is known to be poisonous for the weak. Just as bread, meat, and wine, though they sustain the strong, are lethal poison for the weak. This is evident, as these foods are poisonous for the weak who cannot endure them. Similarly, accepting sophisticated faith with the accepted, but not understood, faith, according to the level befitting his wise intellect, he still stands in his naivety. However, as he understands his accepted belief from his childhood, he becomes less naive and more discerning.