Question 1

What is the best book to start with?

Accepted Answer

Ten Diagrams on Sage Learning, tr. Michael Kalton. His own summary of the whole path.

Question 2

What is the most famous quote?

Accepted Answer

This library does not measure fame, and it does not rank lines by how often they are shared. The first line it files for Yi Hwang (Toegye) that is not marked Questionable or Misattributed is “The four moral sprouts arise from principle, with material force following; the seven feelings arise from material force, with principle riding on them.” (Letters to Gi Daeseung (Four-Seven Debate), summary, Summary).

Question 3

What is the most misquoted line?

Accepted Answer

None of the lines this library files for Yi Hwang (Toegye) is marked Misattributed or Questionable. That is a fact about these cards, not a certificate that every popular sentence is theirs.

Question 4

What is one key idea, in a sentence?

Accepted Answer

Four-Seven Debate: Do moral feelings come from a different source than ordinary emotions? He said yes, principle versus material force.