Mutual bargains bind both parties, or neither.
Pacta vel ex naturæ et sanguinis vi, vel ex mutuo fructu, vel ex auctoritate et præsumptione legis obligant.
Bargains are binding either from the ties of nature and blood, or from mutual advantage, or from authority, and from presumption of law.
Pactis privatorum publico juri derogari nequit.
By the bargains of private persons, nothing can be derogated from public law.
Pacto aliquod licitum est quod sine pacto non admittitur.
Any thing is allowed by a bargain, which is not admitted without a bargain.
Panis egentium vita pauperum et qui defraudat eos vir sanguinis.
He is a man of violence, who deprives the indigent poor of bread, and who defrauds them.
Par in parem imperium non habet.