Honeste vivere, non alterum laedere et jus suum cuique tribuere

Honeste vivere, non alterum laedere et jus suum cuique tribuere. To live virtuously, not to injure others and to give everyone his due. These supreme norms of justice are the underlying principles of law and order in society.

The basic principle of human relations, embodied in Article 19 of the Civil Code, provides:

Art. 19. Every person must in the exercise of his rights and in the performance of his duties, act with justice, give every one his due, and observe honesty and good faith.

Article 19, also known as the "principle of abuse of right," prescribes that a person should not use his right unjustly or contrary to honesty and good faith, otherwise he opens himself to liability. It seeks to preclude the use of, or the tendency to use, a legal right (or duty) as a means to unjust ends.

There is an abuse of right when it is exercised solely to prejudice or injure another. The exercise of a right must be in accordance with the purpose for which it was established and must not be excessive or unduly harsh; there must be no intention to harm another. Otherwise, liability for damages to the injured party will attach. (G.R. No. 146322; December 6, 2006)