There are no rules for love or war. (People will be ruthless in love and war.)
If you want to love me, then you must love those who are close to me (and all my habits.)
Thieves do not betray each other.
You cannot be both for and against something. (You cannot be loyal to two masters.)
You cannot expect someone to stay loyal to you if you are having problems.
There is no predicting who is going to have good luck and who bad.
Do not expect good luck to last for ever.
It's better to be born lucky than rich.
Expect things to turn out badly.
Everyone has good luck at some time or other.