Iceland is impossible because only stupid sailors have seen it; and the sailors are only stupid because they say they have seen Iceland.

It is only fair to add that there is another argument that the unbeliever may rationally use against miracles, though he himself generally forgets to use it.
He may say that there has been in many miraculous stories a notion of spiritual preparation and acceptance: in short, that the miracle could only come to him who believed in it.

It may be so, and if it is so how are we to test it?
If we are inquiring whether certain results follow faith, it is useless to repeat wearily that (if they happen) they do follow faith.

If faith is one of the conditions, those without faith have a most healthy right to laugh.

But they have no right to judge.
Being a believer may be, if you like, as bad as being drunk; still if we were extracting psychological facts from drunkards, it would be absurd to be always taunting them with having been drunk.