James 1:19-21

Know this, my beloved brothers: let every person be quick to hear, slow to speak, slow to anger; for the anger of man does not produce the righteousness that God requires. Therefore put away all filthiness and rampant wickedness and receive with meekness the implanted word, which is able to save your souls. 

I consider looseness with words no less of a defect than looseness of the bowels. —John Calvin