"Howl, howl, howl! O, you are men of stones." How does this ending speak about King Lear's idea of divine and human justice?

The continuation of that quote, in reference to the line about heaven's vault cracking, speaks most to this question.  Lear believes in divine justice, he believes - for example - that if  he is king, he deserves by heaven to be king.  And if his daughter is good, truthful, honest, then she deserves by heaven to have lived.  Lear can not reconcile the idea that heaven has allowed her to die, and turns to animalistic fear and expression ("howle!") to demonstrate this latest blow to his rational understanding of the world.