Egg

A simple thing, somehow non-existent, but aplenty in youth

A miniscule thing, swimming, circling, wanting to be more

An impatient thing, insisting, sometimes nearly succeeding

A tired thing, climbing only half heartedly, no will to push

An aged thing, dwindling in numbers, no more time to waste

A helped thing, clinging to optimism, still hanging on in hope

A meant to be thing, a thing that will be, see and do great things