Indeed it is. I often wonder why it was shortened to be put on Lasseters grave. I can think of a couple of possible reasons. Either the original version was considered a bit flowery for a dry old bushwhacker, or they couldn't find a piece of stone big enough to engrave it on, or the engraver got daunted, didn't know what half the words meant, and decided to shorten it up a bit.....
I prefer the lasseters version myself, one, for the rougher language, and secondly, it was the first time i had seen the quote, so I suppose it's a bit sentimental.
What inspired Roosevelt to write it in the first place? I've never known. Any idea?