If any inquiry thus carefully conducted should fail at last of
discovering the truth, it may answer an end perhaps as useful, in
discovering to us the weakness of our own understanding. If it does not
make us knowing, it may make us modest. If it does not preserve us
from error, it may at least from the spirit of error; and may make us
cautious of pronouncing with positiveness or with haste, when so much
labour may end in so much uncertainty.