"The noble Brutus told you Caesar was ambitious. If it were so, it were a grievous fault." – I always thought it interesting that Shakespeare clearly thinks ambition is a vice, and then something changed in the culture to make it a virtue.
"Get thee to a nunnery. Why wouldst thou be a breeder of sinners? I am myself indifferent honest; but yet I could accuse me of such things that it were better my mother had not borne me. I am very proud, revengeful, ambitious, with more offences at my beck than I have thoughts to put them in, imagination to give them shape, or time to act them in."