We often turn a conversation into an argument, even a fight, after one person raises his or her voice. A rising voice or harsh words almost always trigger an angry response. Imagine arguing in a whisper - You might find it equally difficult to argue with someone who insists on answering gently or softly because there is no fuel to the fire of wrath. This verse reminds us that the most enraged will often be disarmed by gentleness, but harsh words will always lead to more anger. 
When someone has wronged or disappointed us, we often express our feelings by accusing others. For example, when we no longer feel loved in a relationship, we say, "You don't love me anymore." Or when our friends haven't contacted us for a while, we say, "You don't care about me anymore." Instead of communicating how we feel, we immediately start blaming others. The other person will most likely get defensive and start an argument. 
What if we gently express our needs and feelings by saying, "I don't feel loved anymore," or a simple "I miss you"? It is easier for others to listen to us when we communicate our needs calmly and without blaming anyone. Kindness produces kindness, and anger produces anger. Universal experience confirms this proverb.

Dear Heavenly Father, help me to watch my words and control my tongue in all my dealings with others. Show me how to display kindness to others as You have displayed kindness toward me. May the conversations I have with others be filled with gentleness and respect so that nothing in my life distracts people from seeing You through me. 
In Jesus's name I pray. Amen.