It is a good and noble thing to stand up for that in which you believe. Sometimes you may even need to fight for your beliefs, but remember when we choose to fight, we are seeking to change the will of others. Changing someone else’s will is not simply changing their mind, but changing their desire to resist the result you propose.
The decision to fight, to try to change someone’s will, should not be decided upon lightly. Even a fight of words can result in harm and injury. Before you start a fight, make sure your fight is for something in which you are willing inflict injury to achieve. Be sure the thing you are willing to injure others over has a great enough value that it will offset the damage you will cause.
We can stand on principles without resorting to a fight, but to do so we much have respect for the principles upon which others stand. In almost all cases, it will be better to stand than to fight. It is a profound task to figure out the exceptions.