How to win an Argument?

A person confided to me “In my  fifty years of existence Arguments have taken a major portion of  myblife. I  won a minority of them and last a majority of them. Every victory in an argument was a feather in a cap and every failure was grief and humiliating. The failure in every argument was a seed for hatred and one day I became a prisoner in the cell of hostility. Became an angry young man ,caustic in his language and bitter in behaviour. Please suggest a way I can choose to get back the freedom of peace and mental tranquility.”. I replied “Lose yourself in every argument so that the loss is never personal. Arguments are negative experiences which will disturb your mental equilibrium”.