Matthew 12:35-37
The good man, out of his good treasure, puts forth good things; and the evil man, out of his evil treasure, puts forth evil things.
Hebrews 4:12-13
For the word of God is living, and effectual, and sharper than any two-edged sword, and piercing even to a dividing of soul and spirit, of both joints and marrow, and is a discerner of the thoughts and intents of the heart.
James 1:26
If anyone thinks that he is religious, while he bridles not his own tongue, but deceives his own heart, this man's religion is vain.
James 3:2-10
For in many things we all stumble. If anyone stumbles not in word, the same is a perfect man, able to restrain also the whole body.