Life - a cyclic construction and deconstruction of matter for the purpose of conducting energy -the destruction or construction could each be the final piece, one making existence finite, the other prolonging it indifinitely - our individual lives suggest construcion precedes destruction, which does not read well for existence in general - on the other hand our lives as a collective, through reproduction of the spieces, again provokes the question as to which is more dominant: construction or destruction?