We may feel hurt by what someone has said. Instead of taking the time to process the words of another, we often just react with pure emotion - throwing an emotional brick back in their face.
Those bricks soon construct an insurmountable wall.
When possible, in interpersonal communication, think your responses through first. Allow yourself to really understand what was said to you. Ask clarifying questions if need be. Try to see the situation from their perspective. Weigh the benefits versus the repercussions of your response. Examine your motive, are you seeking resolution or just retaliating from an offense.
Choose to respond in a way that fosters a better relationship with that person and works towards forward progress.
Next time you throw out a brick - make sure it is used to build a bridge rather than fortify a wall.