Your true enemies - which will destroy your peace - are negative habits and waste thoughts. Your true attainment is the conquest of the self.
Peace ends when you are emotionally involved in a situation. The practice of being an independent observer helps you stay stable and calm. It is the best way to approach a decision in any circumstance.
It is easy to create new things, change places or do something different. To sustain that sense of newness that creates enthusiasm is more difficult. The secret of newness in life is not to do new things constantly, but to see everything you do with new eyes, new insights and a new perspective.
The sages do not consider that making no mistakes is a blessing. They believe, rather, that the great virtue of man lies in his ablility to correct his mistakes and continually make a new man of himself.
--- Wang Yang-Ming
Self-control is not about suppressing emotions or tolerating the pressure of circumstances. Self-control is to be the creator of your thoughts and feelings, to be creative and find new answers. This helps you to remain calm and cool.