Murder and capital punishment are not opposites that cancel one another, but similars that breed their kind. It is the deed that teaches not the name we give it.
Peace is normally a great good, and normally it coincides with righteousness, but it is righteousness and not peace which should bind the conscience of a nation as it should bind the conscience of an individual; and neither a nation nor an individual can surrender conscience to another's keeping.
A permanent peace cannot be prepared by threats but only by the honest attempt to create a mutual trust. However strong national armaments may be, they do not create military security for any nation nor do they guarantee the maintenance of peace.
When we feel happy and peaceful, our happiness and peace radiates around us, and others can enjoy it as well. This is called 'the enjoyment of others of our body of bliss'.