Quotes from book
Theaetetus
Plato
Original title
Θεαίτητος
The Theaetetus is one of Plato's dialogues concerning the nature of knowledge, written circa 369 BCE.

“Wonder is the feeling of a philosopher, and philosophy begins in wonder.”
Plato
book
Theaetetus
155, The Dialogues of Plato, Volume 3, 1871, p. 377 http://books.google.com/books?id=4kQNAAAAIAAJ&pg=PA377
Theaetetus