Tis now the very witching time of night,
When churchyards yawn and hell itself breathes out
Contagion to this world: now could I drink hot blood,
And do such bitter business as the day
Would quake to look on. Soft! now to my mother.
O heart, lose not thy nature; let not ever
The soul of Nero enter this firm bosom:
Let me be cruel, not unnatural:
I will speak daggers to her, but use none;
My tongue and soul in this be hypocrites;
How in my words soever she be shent,
To give them seals never, my soul, consent

Hamlet ~ Act 3 Scene 2