The right ‘NOs’ in life are the real facilitators of intelligent refraining and resultant discipline in life. Simplicity is also a product of right application of ‘NOs’ in life. ‘Only YESs situation’ shall generate an ‘anything can be done’ attitude, which is highly harmful for social wellbeing. In reality right ‘YESs’ are put in place by right ‘NOs’ and it is the harmony of life, which is really difficult to achieve. But it has to be achieved for a calm and pleasant life.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!