Harry Truman actually said...

I expect to work just as hard as I have done for you up to date, and to do it to the best of my ability.

We are faced with great issues now, which I think we can bring to a successful conclusion.

Now, Therefore, I, Harry S. Truman, President of the United States of America, under and by virtue of the authority vested in me by section ...

It makes a man study and wonder whether he is worthy of the confidence, worthy of the responsibility which has been thrust upon him.