Well, I must do’t

Well, I must do't.
Away, my disposition, and possess me
Some harlot's spirit! My throat of war be turn'd,
Which quier'd with my drum, into a pipe
Small as an eunuch, or the virgin voice
That babies lull asleep! The smiles of knaves
Tent in my cheeks, and schoolboys' tears take up
The glasses of my sight! A beggar's tongue
Make motion through my lips, and my arm'd knees,
Who bow'd but in my stirrup, bend like his
That hath receiv'd an alms! I will not do't,
Lest I surcease to honor mine own truth,
And by my body's action teach my mind
A most inherent baseness.