Control emotions in people's lives

Life is full of stimuli and experiences that every day lead to unconscious reactions and many of those derived from the emotions we feel when we are affected by these stimuli. But do we really react in the right way?

Positive emotions in most cases come from positive stimuli, and negative emotions come from negative stimuli.
But can not you really maintain a positive emotion from a negative stimulus?

The human beings of our most basic instincts, we react much faster than we think, we occasionally react negatively, every time we think that someone can harm us in some way.
And from there we use a negative emotion with a negative response.

But I have learned from various readings and in my life that it is better to use as much as possible positive experiences or positive reactions for negative stimuli. People interact better when they work in a positive way.
Of course it is not so easy to achieve because from childhood you only learn to react. And not to analyze.

So, how do we control this? Each negative experience can be fought with a moment of serenity and calmness.
We must use the right emotions for every occasion, with this I do not mean that to feel a negative emotion is wrong, it is totally normal but inefficient.
To know what emotion to use I recommend stopping to reason a moment, and think what result you will get with the emotion you will use.

I leave this incredible quote from Aristoteles:

"Anyone can get angry ... that's easy, but being angry with the right person, with the right intensity, at the right time, for the right reason and in the right way ... that's not so easy"

Follow your dreams.