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 the servant of all great people
and, alas, of all failures as well.
Those who are great, I have made great.
Those who are failures, I have made failures.
You may run me for profit or run me for ruin,
it makes no difference to me.
Take me, train me and I will place the world at your feet.
Be easy with me and I will destroy you.
Who am I?
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Can you guess? Fill in the blank; I am __________.
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