I am your constant companion,
I am your greatest helper or your heaviest burden.
I will push you onward or drag you down to failure.
I am at your command.
Half of the tasks that you do you might just as well turn over to me and I will do them quickly and correctly.
I am easily managed, you must merely be firm with me.
Show me exactly how you want something done; after a few lessons I will do it automatically.
I am the servant of all great people and alas of all failures as well.
I am not a machine, but I work with all the precision of a machine, plus the intelligence of a person.
Now you may run me for profit or you may run me for ruin.
It makes no difference to me.
Take me, train, me, be firm with me, and I will lay the world at your feet.
Be easy with me and I will destroy you.
Who am I? I am called Habit.