3-3-3 is a short, loud, active practice that expands your Emotional Body's capacity to experience and express Feelings and Emotions, beginning with anger.
3-3-3 is definitely not catharsis. Catharsis is the idea that if you express those 'bad' feelings, they will go away and leave you alone.
3-3-3 is cathexis. Cathexis is the approach of experiencing and expressing anger, sadness, fear, and joy clearly and consciously, not mixed together, from zero to 100% intensity, for the purpose of using their intelligence and energy in your daily life and projects. In cathexis you do NOT try to get rid of the Feelings and Emotions. Instead, you try to keep the energy of your Feelings and Emotions circulating around in your Emotional Body to use them as resources.
There is a gigantic difference between Feelings and Emotions. Feelings come up, their energy and information is intentionally applied, and they are completely gone and out of your body in less than three minutes.
Emotions, on the other hand, feel at first exactly like the anger, sadness, fear, and joy of Feelings, but their experience lasts longer than three minutes.
If you ever felt anger, sadness, fear, or joy in your body for longer than three minutes it is not a Feeling. It is an Emotion.
Feelings are for handling things. Emotions are for healing things.
If you do not ongoingly distinguish between Feelings and Emotions the moment they arise in your relationships and communications, your life will be full of confusions, breakdowns, and disappointments.
Here is what it looks like to do 3-3-3...