Lex retro non agit
The law does not operate retroactively
Qui jure suo utitur, nemini facit injuriam
He who uses his legal. rights, harms no one
Natura appetit perfectum, ita est lex
Nature seeks perfection, and so does the law
Judex est lex loquens
The judge is the mouthpiece of the law
Justitia nemini neganda est
Justice is to be denied to no one
Leges humanae nascuntur, vivunt et moriuntur
Human laws are born, live, and die
Lex posterior derogat priori
A subsequent law imports the abolition of a previous one
