Definition of Soliloquy
At the end of Act 5, Scene 2, Bosola tells the Cardinal that he is ready to kill Antonio, but once the Cardinal leaves, Bosola reveals that he is committed to saving Antonio from both the Cardinal and his murderous brother Ferdinand. Bosola’s time alone onstage allows him a moment to reflect on the situation, as he delivers a soliloquy about the things he’s witnessed and what he has resolved to do about it. This soliloquy allows Bosola to spill his innermost thoughts, revealing them to the audience. After lying to the Cardinal, he is able to reveal his true plan without giving himself away to any of the other characters. He makes a vow to Antonio:
I’ll seek thee out, and all my care shall be
To put thee into safety from the reach
Of these most cruel biters that have got
Some of thy blood already.