The Most Powerful Response When Your Child is Inconsolable

My 4 year old stands there bawling in the middle of his room. All I did was ask him to put away the Duplo bricks that have ben haphazardly strewn all across his room, and he looses it. "Kiddo, I don't understand why you're so upset, can you tell me why you're so sad?" He looks at me and bawls harder.