From Art and the Bible by Francis Schaeffer:
Christianity is not just "dogmatically" true or "doctrinally" true. Rather, it is true to what is there, true in the whole area of the whole man in all of life.
The ancients were afraid that if they went to the end of the earth, they would fall off and be consumed by dragons. But once we understand that Christianity is true to what is there, including true to the ultimate environment -- the infinite, personal God who is really there -- then our minds are freed. We can pursue any question and can be sure that we will not fall off the end of the earth. Such an attitude will give our Christianity a strength that is often does not seem to have at the present time.