Mastery of your
emotions is not suppression, but recognition of what you are feeling,
acknowledgment of the cause and source of those thoughts, and making the
conscious choice of transmuting that thought to one with the highest vibration.  Doing so is the true meaning of alchemy.  You can and do experience thoughts from both
extremes of vibrations whilst in human form. 
You find balance by then balancing the human side with your soul nature.

The human being is a test tube in an emotional laboratory,
always mixing a bit of this and that: 
happy and sad, angry and peaceful, loving and spiteful.  Will the concoction boil over or settle
nicely in the tube?  Shake things up a
bit and see what happens.  That is why
you are here.  You may or may not find
balance whilst focused on the experiment, but step outside the laboratory.  Rise above it to the balcony of the observatory
and there decide which action caused the optimum reaction.  Write up your findings in the record of the
soul, then return to the laboratory for further research, experimentation,
learning, and growth through the choices you now make. 

A laboratory can be a hazardous place.  At times the mix can be explosive.  But never forget that you have life … eternal
life … outside the laboratory where you can retreat at any time by merely
focusing on that greater aspect of you that is spirit.