Colossians 4:6 Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every man.
Being polite is not a sign of weakness in your character but something that reveals the excellence of God in you.
James 3:13 Who is a wise man and endued with knowledge among you? let him shew out of a good conversation his works with meekness of wisdom.
When you use the right words to address others, you're actually displaying the wisdom of God that's in you. But bitterness in the heart of man will produce harsh words and abusive communication.
Let your words reflect the presence of the spirit of God that lives in you. Let your words uplift, encourage, inspire,soothe and build. Don't allow communication that could inflict pain or stir stife and discord proceed from your lips.
2 Timothy 2:24 And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient, 2:25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth;
See others with the eyes of God and address them that way. Be humble in your communication. Don't use insulting words to address people and don't raise your voice against them. Live the higher life of good communication. And you'll see God move on your behalf.
Thanks for reading