I picked up this book for the third time in my life, due to a very interesting article in edition no. 1, 2010 of the Dutch glossy Happinez. This article expressed some new insights in the subject of the book, which caused me to want to reread the book through new glasses, as it where.
This page collects some online resources of the book.
The original Phaedrus Phaedrus, from Plato's The Symposium.
Goethe's poem Erlkönig
Immanuel Kant: The Critique of Pure Reason