The heart of a virtuous person has settled down and he does not rush about at things. A person of little merit is not at peace but walks about making… - Yamamoto Tsunetomo

When discussing things with someone, it is best to speak appropriately about whatever the subject may be. No matter how good what you are saying might be, it will dampen the conversation if it is irrelevant.

...si es diligente en su servicio y se perfecciona en las artes militares, no se cubrirá jamás de vergüenza. Pero si se dedica a hacer egoístamente lo que le plazca, en caso de crisis se deshonrará. Incluso, no será jamás consciente de su deshonra. Si nada le importa, excepto el hecho de no estar en peligro y de sentirse feliz, se descuidará de una manera completamente lamentable.

People with intelligence will use it to fashion things both true and false and will try to push through whatever they want with their clever reasoning. This is injury from intelligence. Nothing you do will have effect if you do not use truth. In affairs like law suits or even in arguments, by losing quickly one will lose in fine fashion. It is like sumo. If one thinks only of winning, a sordid victory will be worse than a defeat. For the most part, it becomes a squalid defeat.