The famous Ryoanji temple in Kyoto has 15 stones in its rock garden that are arranged such that you can only see 14 of them from any given angle. That is to remind us that one mind can never understand everything.
One mind cannot understand everything, including the fact that it cannot understand everything. A long time ago i asked myself how am i supposed to understand this world with imperfect senses. There is no such thing as absolute understanding, something i've mistakenly thought of as enlightenment. All i can hope for is to do my best with the limited information i have.
The "why" is not important. The "how" might be.