Malachi 3:13-16
What you say can get you in a lot of trouble.
Do not be quick with your mouth, do not be hasty in your heart to utter anything before God. God is in heaven and you are on earth, so let your words be few. (Ecclesiastes 5:2 NIV)
Sin is not ended by multiplying words, but the prudent hold their tongues. (Proverbs 10:19 NIV)
We don't say everything we are thinking.
You can't talk gloom and doom and expect to experience sunshine and roses.
We succeed or fail by our words.