“Sometimes I believe in as many as six impossible things before breakfast.”
Six Impossible Things are things that Alice sometimes counts before breakfast as she mentiones a few times in the movie. When she mentions them to the Mad Hatter, he tells her that in his opinion it is an eccelent practice. The first time she counted them in the movie was when she was fighting The Jabberwock.
The Six Impossible Things were:
1.There's a potion that can make you shrink. 2.And a cake that can make you grow. 3.Animals can talk. 4.Cats can disappear. 5.There is a place called Wonderland. 6.I can slay the Jabberwocky.