The Tempest Sebastian and Antonio Quotes

SEBASTIAN
A living drollery! Now I will believe 
That there are unicorns, that in Arabia
There is one tree, the phoenix' throne, one phoenix
At this hour reigning there.
ANTONIO
I'll believe both;
And what does else want credit, come to me
And I'll be sworn 'tis true. Travellers ne'er did lie,
Though fools at home condemn 'em.
GONZALO
If in Naples
I should report this now, would they believe me? 
If I should say, I saw such islanders—
For, certes, these are people of the island—
Who, though they are of monstrous shape, yet note
Their manners are more gentle, kind, than of
Our human generation you shall find 
Many, nay, almost any. (3.3.26-41)

Once one fantasy is proven true, the seer can no longer trust what he believes to be reality.