Lysis (Greek λύσις, lýsis from lýein "to separate")

Nihil difficilius quam amicitiam usque ad extremum vitae permanere

-Cicero

SHYLOCK: This kindness will I show.
Go with me to a notary, seal me there
Your single bond; and, in a merry sport,
If you repay me not on such a day,
In such a place, such sum or sums as are
Express'd in the condition, let the forfeit
Be nominated for an equal pound
Of your fair flesh, to be cut off and taken
In what part of your body pleaseth me.

ANTONIO: Content, i' faith: I'll seal to such a bond
And say there is much kindness in the Jew.

BASSANIO: You shall not seal to such a bond for me:
I'll rather dwell in my necessity.

ANTONIO: Why, fear not, man; I will not forfeit it:
Within these two months, that's a month before
This bond expires, I do expect return
Of thrice three times the value of this bond.

SHYLOCK: O father Abram, what these Christians are,
Whose own hard dealings teaches them suspect
The thoughts of others! Pray you, tell me this;
If he should break his day, what should I gain
By the exaction of the forfeiture?
A pound of man's flesh taken from a man
Is not so estimable, profitable neither,
As flesh of muttons, beefs, or goats. I say,
To buy his favour, I extend this friendship:
If he will take it, so; if not, adieu;
And, for my love, I pray you wrong me not.

ANTONIO: Yes Shylock, I will seal unto this bond.
-Shakespeare, "Merchant of Venice"