“In wonder all philosophy began, in wonder it ends. … But the first wonder is the offspring of ignorance, the last is the parent of adoration.”

Theaetetus, 155d
Plato, Theaetetus

155, The Dialogues of Plato, Volume 3, 1871, p. 377 http://books.google.com/books?id=4kQNAAAAIAAJ&pg=PA377
Theaetetus

Part II, chapter 1.
Proverbs (1546), Bartlett's Familiar Quotations, 10th ed. (1919)

Metaphysics by Aristotle – Book 1, ClassicalWisdom.com
The second sentence is in Metaphysics A 2, 928^b 17–20, Aristotle: Metaphysics Beta: Symposium Aristotelicum, Michel Crubellier & Andre´ Laks, eds. (Oxford University Press, 2009), p. 4.
Metaphysics
Variant: [And] one who experiences a difficulty and who feels wonder thinks that he does not understand..., so that, if it is to escape ignorance that they have practised philosophy, then it is clearly for the sake of knowing, and not for any practical purpose, that they have pursued understanding.

if he does depart from his state of wonder, he has ceased to philosophize.
Source: Leisure, the Basis of Culture (1948), The Philosophical Act, pp. 105–106

Source: As You Like It

Source: Life of Pi

Love is Enough (1872), Song VIII: While Ye Deemed Him A-Sleeping
Context: All wonder of pleasure, all doubt of desire,
All blindness, are ended, and no more ye feel
If your feet treat his flowers or the flames of his fire,
If your breast meet his balms or the edge of his steel.
Change is come, and past over, no more strife, no more learning:
Now your lips and your forehead are sealed with his seal,
Look backward and smile at the thorns and the burning.
— Sweet rest, O my soul, and no fear of returning!