There are parts of the Torah that we are required to learn, even though we cannot truly understand them–certain passages of aggadah in the Talmud, descriptions of the upper worlds with their angels and seraphim–the reality of which we have not the slightest idea.
Why must we learn these passages?
The answer, expressed differently by a number of sages, in essence states that even if a person does not understand a passage of Torah, he has nevertheless grasped a certain configuration.
The difference between him and someone who did not learn that passage will become apparent in that future time when "your Teacher will no longer hide" and "eye to eye they will see."
The person who learned that passage will pick up from where he had left off, this time with comprehension.
Thus, learning Torah not only transfers knowledge but also provides a person with a framework in which much more will be revealed in messianic times.
–Rabbi Adin Steinsaltz
From Understanding the Tanya, p. 230, by Rabbi Adin Steinsaltz