A fool gives full vent to his anger, but a wise man keeps himself under control. – Proverbs 29:11 (NIV).
The more you talk, the more you are going to display your full emotions. Whether you are angry or sad, the more you talk, the more you wear your heart on your sleeve. This is fine if you are among close friends. Not so good if you are at work. Choose carefully who you will share your emotions with.