Answer:
The information presented in the book is credible.
Explanation:
"George's Secret Key to the Universe" is a children's book and features a group of children traveling through space and learning scientific concepts through portals and windows created by a highly technological and efficient computer. Although this plot is very fanciful and unrealistic, the book presents very credible scientific information, explaining in a childish but efficient way concepts like atoms, black holes, celestial bodies, planets, among others.
My reaction to this quote is that Abraham Lincoln is referring to the ideal that once people have power they tend to abuse it for their advantage, and personal gain. For Example, gerrymandering. Gerrymandering is the manipulation of the county sizing and grouping in states by the Legislative branch to guarantee their reelection into federal or state offices. A typically Democratic city perhaps may be grouped or redrawn to conjoin with a vastly Republican populated area, creating a larger group of supporters of one party, and a polarized county.
No The Gettysburg Address is not a metaphor.