Shall I not have barely my principal?

Shylock
Shall I not have barely my principal?
Portia, as Balthazar
Thou shalt have nothing but the forfeiture
To be so taken at thy peril, Jew.
Shylock
Why, then, the devil give him good of it!
I’ll stay no longer question.                        
 He begins to exit.

Down, therefore, and beg mercy of the Duke.

Portia, as Balthazar
Tarry, Jew.
The law hath yet another hold on you.
It is enacted in the laws of Venice,
If it be proved against an alien
That by direct or indirect attempts
He seek the life of any citizen,
The party ’gainst the which he doth contrive
Shall seize one half his goods; the other half
Comes to the privy coffer of the state,
And the offender’s life lies in the mercy
Of the Duke only, ’gainst all other voice.
In which predicament I say thou stand’st,
For it appears by manifest proceeding
That indirectly, and directly too,
Thou hast contrived against the very life
Of the defendant, and thou hast incurred
The danger formerly by me rehearsed.
Down, therefore, and beg mercy of the Duke.
Gratiano
Beg that thou mayst have leave to hang thyself!
And yet, thy wealth being forfeit to the state,
Thou hast not left the value of a cord;
Therefore thou must be hanged at the state’s charge.
Duke
That thou shalt see the difference of our spirit,
I pardon thee thy life before thou ask it.
For half thy wealth, it is Antonio’s;
The other half comes to the general state,
Which humbleness may drive unto a fine.
Portia, as Balthazar
Ay, for the state, not for Antonio.
Shylock
Nay, take my life and all. Pardon not that.
You take my house when you do take the prop
That doth sustain my house; you take my life
When you do take the means whereby I live.
Portia, as Balthazar
What mercy can you render him, Antonio?
Gratiano
A halter gratis, nothing else, for God’s sake!
Antonio
So please my lord the Duke and all the court
To quit the fine for one half of his goods,
I am content, so he will let me have
The other half in use, to render it
Upon his death unto the gentleman
That lately stole his daughter.
Two things provided more: that for this favor
He presently become a Christian;
The other, that he do record a gift,
Here in the court, of all he dies possessed
Unto his son Lorenzo and his daughter.
Duke
He shall do this, or else I do recant
The pardon that I late pronouncèd here.
Portia, as Balthazar
Art thou contented, Jew? What dost thou say?
Shylock
I am content.
Portia, as Balthazar
Clerk, draw a deed of gift.
Shylock
I pray you give me leave to go from hence.
I am not well. Send the deed after me
And I will sign it.