When we let our emotions flow, irrespective of which it is, anger, happiness, stress, attracted, attached, sadness, hollowness, etc, whatever the emotion may be, we lose our consciousness, we lose the judgement of right and wrong, we lose to think about the consequences of our actions triggered by emotions. We start to loosen or tighten, (depending on the emotion) the strings of certain important relationships.
Decisions made and actions taken under emotional understandability of the situation can create great impact, it may be positive or negative, we can judge the positivity or negativity of the emotion by understanding particularly what we are feeling, are we feeling growth? Or destruction? Feelings and emotions are indicators of what we are thinking. We can alter the state of our thinking by our will, judgement in our thinking states and altering them at will, boosts our growth in understanding life.