Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer every one.
2 Timothy 2:25-26
And the Lord’s servant must not be quarrelsome but kindly to every one, an apt teacher, forbearing, correcting his opponents with gentleness. God may perhaps grant that they will repent and come to know the truth, and they may escape from the snare of the devil, after being captured by him to do his will.
to speak evil of no one, to avoid quarreling, to be gentle, and to show perfect courtesy toward all men.
He can deal gently with the ignorant and wayward, since he himself is beset with weakness.
But the wisdom from above is first pure, then peaceable, gentle, open to reason, full of mercy and good fruits, without uncertainty or insincerity.
1 Peter 3:15
but in your hearts reverence Christ as Lord. Always be prepared to make a defense to any one who calls you to account for the hope that is in you, yet do it with gentleness and reverence;