Romans 7:14
For we know that the Law is a spiritual thing; but I am unspiritual--the slave, bought and sold, of sin.
Matthew 12:34-35
O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.
Romans 7:12
So that the Law itself is holy, and the Commandment is holy, just and good.
Ephesians 4:29
Let no unwholesome words ever pass your lips, but let all your words be good for benefiting others according to the need of the moment, so that they may be a means of blessing to the hearers.
Colossians 4:6
Let your language be always seasoned with the salt of grace, so that you may know how to give every man a fitting answer.