Some are like Wheelbarrows...
No good unless pushed. 

Some are like Trailers...
They have to be pulled.

Some are like Kites...
If you don't keep them on a string
they will fly away.

Some are like Blisters...
They'll always show up
when the work is done.

And, some are like Good Watches...
Open-faced, pure gold, quietly busy
and full of good works!