In Romans 15, Paul mentioned that he has been meaning to go to Spain to preach the word of God. At that time, Spain was considered the end of the known world. No one knows if he actually went there but R. Kent Hughes believes it doesn’t matter:
To us arrival is everything, but to God the journey is most important, for it is in the journey that we are perfected, and it is in hardships that he is glorified as we trust him.
It is of greatest importance that we have hearts with dreams, great visions of what God can do with us. We need our “castles in the sky”– our Spains. We need to see “spires away on the world’s rim,” to dream of victories and accomplishments for God. Not all of us will meet our dream’s end, but that is all right because God is more interested in the process than the prize, in the journey than the road’s end.