The hardest part about writing

Is the beginning. I have this killer paper that is in my brain. I know my topic. I have annoyed my wife and friends to death with hours pontificating and lecturing them on it and every time I begin a new document on Word, I cannot seem to write the perfect introduction.
If I wrote the paper without it, I could guarantee 25 pages in 5 hours or less.
But, I digress. I am still at the beginning, staring at another crappy introduction.
I guess I am over-thinking it.
I could rewrite it.
I think I just want to go for the jugular too soon.