Synthesized answer
The provided passages do not contain enough information to explain the key concepts of "Living" in my own words. The passages describe the book "Lives by Plutarch" as a collection of character studies comparing statesmen and generals from ancient Greece and Rome [Passage 1]. However, they do not elaborate on the specific concepts within this book or the author's approach to presenting them.
To explain the key concepts, more details about Plutarch's methods, themes, or the underlying philosophy of his "Lives" would be necessary. Without this additional information, I can only state that the book focuses on biographical comparisons of prominent historical figures [Passage 1].
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Lives by Plutarch Description: Character studies comparing statesmen and generals of pre-Christian Greece and Rome.