To be the same in thine own act and valor
As thou art in desire? Wouldst thou have that
Which thou esteem'st the ornament of life,
And live a coward in thine own esteem;
Letting "I dare not" wait upon "I would,"
Like the poor cat i' the adage?

MACBETH.
Pr'ythee, peace!
I dare do all that may become a man;
Who dares do more is none.

LADY MACBETH.
What beast was't, then,
That made you break this enterprise to me?
When you durst do it, then you were a man;
And, to be more than what you were, you would
Be so much more the man. Nor time nor place
Did then adhere, and yet you would make both:
They have made themselves, and that their fitness now
Does unmake you. I have given suck, and know
How tender 'tis to love the babe that milks me:
I would, while it was smiling in my face,
Have pluck'd my nipple from his boneless gums
And dash'd the brains out, had I so sworn as you
Have done to this.

MACBETH.
If we should fail?