A door slams and makes a loud noise. Instantly, you tense, not because you are frightened, but because a slamming door has a different meaning to you. It denotes anger. It denotes raised vibrations in terms of amplitude and not higher consciousness. But could it mean simply that someone used a bit of force inadvertently when closing the door? Could a strong wind have blown it shut? And yet, look at your reaction. Tension. Perhaps even anger within you now.
Awareness. This is how you break the cycle of reactivity. Pay attention to the meaning you ascribe to everything with the intention of being less reactive. Peace is the goal. Greater joy is the result.