When I was younger my Mom used to say ‘there is nothing you can say loud that you can’t say quiet’. Learn to have quiet words but big actions. Don’t be the one who is not taken seriously unless you are yelling. Say what you mean. If you say you’re going to do something … Do it. Let your consistent actions make WHAT you say more important than HOW you said it.
Ephesians 4:29 – Don’t say anything that would hurt another person. Instead, speak only what is good so that you can give help wherever it is needed. That way, what you say will help those who hear you.