Question 1

What is the best book to start with?

Accepted Answer

What Is Enlightenment, then the Groundwork, section 1, in Gregor The essay is short and public. The Groundwork's opening shows the good will before the formulas multiply. The Critique can wait until those are in hand.

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 Immanuel Kant that is not marked Questionable or Misattributed is “Have the courage to use your own understanding! — that is the motto of enlightenment.” (An Answer to the Question: What Is Enlightenment? (1784), Paraphrase or translation).

Question 3

What is the most misquoted line?

Accepted Answer

None of the lines this library files for Immanuel Kant 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

Good will: Only a good will is good without limitation, because talents and happiness can be put to bad use.