The human mind may perceive truth only through thinking, as is clear from Augustine.
There is nothing in your mind which wasn't experienced before hand.
Distinctions drawn by the mind are not necessarily equivalent to distinctions in reality.
An angel can illumine the thought and mind of man by strengthening the power of vision and by bringing within his reach some truth which the angel himself contemplates.
The highest perfection of human life consists in the mind of man being detached from care, for the sake of God.
Now this relaxation of the mind from work consists on playful words or deeds. Therefore it becomes a wise and virtuous man to have recourse to such things at times.