The Voyage of the Dawn Treader
The others all voted for going on in the hope of finding land. I felt it my duty to point out that we didn't know there was any land ahead and tried to get them to see the dangers of wishful thinking. (5.9)
"I hope it will never be told in Narnia that a company of noble and royal persons in the flower of their age turned tail because they were afraid of the dark."
"But what manner of use would it be ploughing through that blackness?" asked Drinian.
"Use?" replied Reepicheep. "Use, Captain? If by use you mean filling our bellies or our purses, I confess it would be no use at all. So far as I know we did not set sail to look for things useful but to seek honour and adventures. And here is as great an adventure as ever I heard of, and here, if we turn back, no little impeachment of all our honours." (12.12-14)
"I myself will sit at this table till sunrise."
"Why on earth?" said Eustace.
"Because," said the Mouse, "this is a very great adventure, and no danger seems to me so great as that of knowing when I get back to Narnia that I left a mystery behind me through fear." (13.40-42)