On Managing One's Feelings, by Dallas Willard

Interestingly, "growing up" is largely a matter of learning to hide our spirit behind our face, eyes, and language so that we can evade and manage others to achieve what we want and avoid what we fear.The child's face is a constant epiphany because it doesn't yet know how to do this. It cannot manage its face. This is also true of adults in moments of great feeling---which is one reason why feeling is both greatly treasured and greatly feared.

- Dallas Willard, The Divine Conspiracy