I am your constant companion. I am
your greatest helper or heaviest burden.
I will push you onward or drag you down
to failure. I am completely at your command.
Half the things I do you might just as well

Turn over to me and I will be able to do
them quickly and correctly.

 I am easily managed – you must merely
be firm with me. Show me exactly  how you
want something done and after a few
lessons I will do it automatically. I am the
servant of all great individuals and, alas, of
all failures, as well. Those who are great, I
have made great. Those who are failures,
I have made failures.

I am not a machine, though I work
with all the precision of a machine plus
the intelligence of a human. You may run
me for a profit or run me for ruin – it
makes no difference to me.

 Take me, train me, be firm with me,
and I will place the world at your feet. Be
easy with me, and I will destroy you.

 

WHO AM I?