You're νery kind. Someday it'll get you killed.
A good leg will fall; a straight back will stoop; black beard will turn white; a curled pate will grow bald; a fair face will wither; a full eye will wax hollow: but a good heart, Kate, is the sun and the moon; or, rather, the sun, and not the moon; for it shines bright and never changes, but keeps his course truly.
It is very easy to be kind; the difficulty lies in being just.
Explanation:
Hachiman rescued Yui's dog, and Yui, imbued with this, begins to sympathize with him. Apparently a quote about friendship out of pity or out of guilt ...
— What happened to you, Morgana? As a child you're so kind, so compassionate.
— I grew up.
Did anything matter except goodness—goodness of heart? What else was there that was real?