“Do not strive with a man without cause, if he has done you no harm.” -Proverbs 3:30NKJV
There are many things that are worth fighting for, and yes, there will be battles to be fought such as fighting injustice, standing your ground for truth, resisting temptation, and defending what is right.
It is, however, fruitless to argue or have needless fights over trivial matters because trivial matters are not worth fighting over. Save your energy to battle for the things that really matter such as fighting against sin, opposing the lies of the enemy, and contending for the faith.
Linda A. Knowles
That’s right: Let GOD fight your battles for you. Our GOD is THE GOD of JUSTICE, and it is difficult to let go of whatever is going on around us that we’re facing. However, letting go and letting GOD do what HE has to do is something we won’t regret. I learned many years ago, never to repay evil with evil because the WORD OF GOD states, “And if you call on him as Father who judges impartially according to each one’s deeds, conduct yourselves with fear throughout the time of your exile,” (1 Peter 1:17 ESV). We conduct ourselves as GOD would have us to conduct ourselves. GOD has set the standards of morality and ethics. GOD has set the standard of holiness, and therefore, we need to conduct ourselves knowing GOD sees all we do and hears all we say. Eventually, we will have to give an account to HIM for every idle word spoken (Matthew 12:36) and everything we have done (2 Corinthians 5:10). “And he said, ‘Listen, all Judah and inhabitants of Jerusalem and King Jehoshaphat: Thus says the 
Stained Glass Confessions 