It is a mark of soulfulness to be present in the here and now.
When we are present, we are not fabricating inner movies. We are seeing what is before us.
Most people hew the battlements of life from compromise, erecting their impregnable keeps from judicious submissions, fabricating their philosophical drawbacks from emotional retractions and scalding marauders in the boiling oil of sour grapes.
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.