James 1:19-20 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath: For the wrath of man worketh not the righteousness of God.
The wrath of man cannot work the righteousness that God requires. For example, no zeal of doing anything out of anger can be justified before a just God. Therefore, we have been given two ears and one mouth so that we can listen twice as much as we speak.
One of God’s attributes is that He is slow to anger (Psa. 103:8; 145:8; Joel 2:13) and we are warned that a wrathful man stirs up strife: but he that is slow to anger appease strife and that he that is slow to anger is better than the might, and he that rule his spirit than he that takes a city (Pro. 15:18; 16:32). The usage of the tongue is the one thing we are warned of the most in the Word of God and something we should all be sufficiently aware of (See Pro. 18: 7; 20-21; 1Pet. 3:10; Jam. 1:26; 3:1-12).