Is the Tongue a Part of the Body?

Not many of you should presume to become teachers, brothers and sisters. We who teach will be judged more strictly. With the tongue we praise our lord and father, and with it curse human beings made in god's image. Such wisdom does not come down from heaven, but is earthly, unspiritual and demonic. If you harbour bitter envy and selfish ambition in your heart, do not boast about it or hide the truth.