For, falling to a devilish exercise, And glutted with learning's golden gifts, He surfeits upon cursed necromancy.
-- Chorus (Prologue paragraph lines 23-25)

Importance: This quote describes how pride causes Faustus to make a deal with the devil.

Affords this art no greater miracle?
-- Faustus (Scene I paragraph line 9)

Importance: Faustus is expressing his frustration with the lack of fame his chosen profession has given him.

I wonder what's become of Faustus that was wont to make our schools ring with sic probo?
-- Scholar 1 (Scene II paragraph line 1)

Importance: Two scholars are searching for Faustus. This statement shows that Faustus had some recognition from his work at school, but it clearly is not the kind Faustus wants.

I see there's virtue in my heavenly words; Who would not be proficient in this art?
-- Faustus (Scene III paragraph lines 33-34)

Importance: This is Faustus's reaction to his first successful conjuring of a devil. This shows that Faustus thinks that magic is simple. Faustus is a little naive to the dangers of playing with magic.

I am a...
-- Mephistophilis (Scene III paragraph lines 46-48)