You have a cup full of coffee and then you try to add water or more coffee to it and what would happen? I guess you do not need any explanation on this, it is a very simple thing, as the cup is already full, the water would spill out. So what would you have to do to add more water, you need to drain out existing coffee or you need to keep your cup empty. The cup of coffee is the core of you, how you feel inside. If you have peace within you, the cup is empty, then you are ready to take any blow and if the cup is not empty, it would keep spilling out. You blame people that they do not let you be at peace, they keep testing you, but have you ever imagined that some are more tolerant and some are. Some flicker with a small wind and some are stable even amidst the storms. It is not possible that they have not faced those hard times or testing times or testing people in life, so why are they more stable. It is because they have peace with in them. Whatever you expect from world actually is present with in you. Every splendour of this world, the God, the happiness, the peace, everything is with in you. If you keep looking for it outside, you will never find it. Because its all with in you, if you have been asking people to let you be at peace, and it is inside you, it means, you been searching at wrong places, so how can you find it?
You need to look inside, who is real you, what is bothering you, what have you been reacting the way you have been reacting, what is the real issue, what is the truth, once you will understand the truth and yourself, you will be at peace. Your core would be at peace and you will learn to be calm. You need to train yourself for peace and you only can do that. Stop reacting to everything and keep your realself intact once you find it.