Our intellect is a power of our Soul that is inseparable from our free will to choose, that we are created with.
Our intellect is NOT the brain.
Our intellect is how we critically and abstractly think and reason.
Our intellect is how we are both rational/logical/realistic, and irrational/illogical/unrealistic (modern English use to mean the absence of being correct, right, logical)
Our intellect combined with our free will is how we are able to choose to be self-aware, are creative for the sake of creativity, choose to have self-control, choose to give love when we are given evil, and can choose the opposite of what we feel and want/desire.
With our intellect and free will, we make all of our interior and exterior choices/acts or actions.
Our interior intellectual choices/acts include our: thoughts, beliefs, expectations, wants/desires, like/dislikes, attractions, and their resulting psychological emotions and feelings.