Explanation, Please

Will someone please explain to me:
1) Why does adding BILLIONS to the national debt, borrowed from China and future generations, help the economy?

2) Why the strength of our country has to be based on you and me spending, spending, and then spending some more? and

3) Why using the "economic stimulus package" rebates to pay bills and buy gas, or even save it, is bad for the economy and is a fear of some economists?

Why does this sound like addictive thinking?