Those who are good have good things saved in their hearts. That’s why they say good things. But those who are evil have hearts full of evil, and that’s why they say things that are evil.
Let the teaching of Christ live inside you richly. Use all wisdom to teach and counsel each other. Sing psalms, hymns, and spiritual songs with thankfulness in your hearts to God.
When you talk, don’t say anything bad. But say the good things that people need—whatever will help them grow stronger. Then what you say will be a blessing to those who hear you.
Then Jesus said to the followers, “So every teacher of the law who has learned about God’s kingdom has some new things to teach. He is like the owner of a house. He has new things and old things saved in that house. And he brings out the new with the old.”
Good people have good things saved in their hearts. That’s why they say good things. But those who are evil have hearts full of evil, and that’s why they say things that are evil. What people say with their mouths comes from what fills their hearts.