John Wesley on Acts 19:21

After these things were ended - Paul sought not to rest, but pressed on, as if he had yet done nothing. He is already possessed of Ephesus and Asia. He purposes for Macedonia and Achaia. He has his eye upon Jerusalem, then upon Rome; afterward on Spain, Rom 15:28. No Cesar, no Alexander the Great, no other hero, comes up to the magnanimity of this little Benjamite. Faith and love to God and man had enlarged his heart, even as the sand of the sea.