Which two lines express desperation in this excerpt from Sir Philip Sidney's Sonnet 1? But words came halting forth, wanting Invention's stay, Invention, Nature's child, fled step-dame Study's blows, And others' feet still seem’d but strangers in my way. Thus, great with child to speak, and helpless in my throes, Biting my truant pen, beating myself for spite-- "Fool," said my Muse to me, "look in thy heart and write."