How to achieve peace of mind?

Peace is a condition of mind brought about by a serenity of soul.Peace is not an absence of war, it is a virtue, a state of mind, a disposition for benevolence, confidence, justice.like to believe that people in the long run are going to do more to promote peace than our governments. Indeed, I think that people want peace so much that one of these days governments had better get out of the way and let them have it.If man does find the solution for world peace it will be the most revolutionary reversal of his record we have ever known.You can't separate peace from freedom because no one can be at peace unless he has his freedom.First keep the peace within yourself, then you can also bring peace to others.
Stay calm There is enormous strength in serenity. Stay calm, and you stay in control.
When noise and clutter and confusion overwhelm the situation, the way forward is with calm and determined strength. Stay calm, and you make the best decisions.
Just because there is a need for urgency does not mean there's a need for panic. Stay calm, and you can be the most effective.
Anxiety can drain away your energy and give you nothing useful in return. Rushing around in a frenzy brings on carelessness and wasted effort.
You can let yourself be drawn into anxiety and haste, but why would you ever want to? Instead, stay calm, and able to make a positive difference.
Always know that you can choose your own response, whatever the situation. Choose to stay calm, for it is almost always your best first choice