Answer: They are necessary in order to discover that you cannot attain the truth from egoism. But you still advance thanks to the ego. On one hand, many feelings and experiences appear in us which we attain with the help of the ego.
On the other hand, we begin to realize that we will not attain the truth this way. We need to ascend above egoism and then we will begin to think about what faith above reason means.
From KabTV’s “Fundamentals of Kabbalah” 12/15/19