Mary Wollstonecraft Shelley said this quote

We are all each of us riddles, when unknown one to the other. The plain map of human powers and purposes, helps us not at all to thread the labyrinth each individual presents in his involution of feelings, desires and capacities; and we must resemble, in quickness of feeling, instinctive sympathy, and warm benevolence, the lovely daughter of Huntley, before we can hope to judge rightly of the good and virtuous of our fellow-creatures.