Although they may have to kill
Or suffer themselves to be killed,
A person of composure remains dispassionate.
Nothing is ever destroyed,
Nothing is ever created.
All is infinity.
For most people, killing is an abhorrence. If they had to kill, they would be horrified and their emotions would be uncontrollable. Likewise, if they were being threatened with death, they would be afraid and would struggle to keep alive.
Both those situations involve extreme attachment to what we know and how we wish to remain. Both situations indicate a fundamentally limited view of the world. We assume that we are truly destroying someone. But though this body may be slain, the soul cannot be slain. Every soul is but a part of an infinite, cosmic soul.
You could subtract numerous souls from the world, and the number of souls would not be diminished. Numerous souls could be born, and the number of souls would not be augmented. Nothing is truly destroyed, and nothing is truly born. Only appearances change.
Therefore, people of composure view the transformations of the world calmly. They do not become alarmed with the different permutations of phenomena. They know that these are all merely outer manifestations of an indefinable, unlimited, and infinite reality.