Romans 7:14
The Law is spiritual; we know that. But then I am a creature of the flesh, in the thraldom of sin.
Matthew 12:34-35
You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.
Romans 7:12
So the Law at any rate is holy, the command is holy, just, and for our good.
Ephesians 4:29
Let no bad word pass your lips, but only such speech as is good for edification, as occasion may require, words that are gracious and a means of grace to those who hear them.
Colossians 4:6
let your talk always have a saving salt of grace about it, and learn how to answer any question put to you.