—If you must attack, then attack the argument, not the person.
Like a muddied spring or a polluted fountain is a righteous man who gives way before the wicked.
Proverbs 25:26
—When you judge, you are placing yourself in a place of higher authority than the One who made you. Judgment is reserved for God and God alone.
Beloved, never avenge yourselves, but leave it to the wrath of God, for it is written, “Vengeance is mine, I will repay, says the Lord.”
Romans 12:19
—Take deep breaths and give yourself a moment to think.
Peace I leave with you; my peace I give to you. Not as the world gives do I give to you. Let not your hearts be troubled, neither let them be afraid.
John 14:27
—We love because God loved us first.
Beloved, let us love one another, for love is from God, and whoever loves has been born of God and knows God.
1 John 4:7
—Take time to hear from every side.
A fool takes no pleasure in understanding, but only in expressing his opinion.
Proverbs 18:2
—Assume the benefit of the doubt.
Love bears all things, believes all things, hopes all things, endures all things.
1 Corinthians 13:7
—To slander from behind a screen does not make it right.
Whoever slanders his neighbor secretly I will destroy. Whoever has a haughty look and an arrogant heart I will not endure.
Psalm 101:5
—Turn the other cheek.
You have heard that it was said, ‘An eye for an eye and a tooth for a tooth.’ But I say to you, Do not resist the one who is evil. But if anyone slaps you on the right cheek, turn to him the other also.
Matthew 5:38-39
—Humility is an act of respect and maturity.
Have this mind among yourselves, which is yours in Christ Jesus, who, though he was in the form of God, did not count equality with God a thing to be grasped, but emptied himself, by taking the form of a servant, being born in the likeness of men. And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross.
Philippians 2:5-8
—Stand up not for what you believe is right, but for what is right.
In all circumstances take up the shield of faith, with which you can extinguish all the flaming darts of the evil one; and take the helmet of salvation, and the sword of the Spirit, which is the word of God…
Ephesians 6:16-17
—Not every battle has to be fought.
‘…You will not need to fight in this battle. Stand firm, hold your position, and see the salvation of the Lord on your behalf, O Judah and Jerusalem.’ Do not be afraid and do not be dismayed. Tomorrow go out against them, and the Lord will be with you.
2 Chronicles 20:15-17
—Evil will be vanquished in the end.
Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away, and the sea was no more. And I saw the holy city, new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband. And I heard a loud voice from the throne saying, “Behold, the dwelling place of God is with man. He will dwell with them, and they will be his people, and God himself will be with them as their God. He will wipe away every tear from their eyes, and death shall be no more, neither shall there be mourning, nor crying, nor pain anymore, for the former things have passed away.”
Revelation 21:1-4

All Bible verses from English Standard Version (ESV) translation.