Regulating one’s emotions in a natural way is vital to calm and pleasant life. Here the words ‘natural way’ deserve special emphasis. If something has to happen in a natural way it should be an innate habit. Acquired habits can also be internalized and made innate through generations of regular practice. The acceptable quality, strength and frequency of emotions that are ideal for the wellbeing of individual as well as the society are established over a long period of time, which is also highly related to the place. To internalize these, one has to live as an integral part of the society by remaining always responsive.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!