In Act 1, Scene 3 of The Cenci, Count Cenci learns about his sons’ deaths and he says:
Here are the letters brought from Salamanca; Beatrice, read them to your mother. God! I thank thee! In one night didst thou perform, By ways inscrutable, the thing I sought. My disobedient and rebellious sons Are dead!—Why, dead!—What means this change of cheer? You hear me not, I tell you they are dead; And they will need no food or raiment more: The tapers that did light them the dark way Are their last cost. The Pope, I think, will not Expect I should maintain them in their coffins. Rejoice with me—my heart is wondrous glad.
Which theme does this quote depict?