"And a vision appeared to Paul in the night; There stood a man of Macedonia, and prayed him, saying, Come over into Macedonia, and help us. And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them."  (Acts 16:9-10)

"Not called, did you say! Not heard the call, I think you should say! Put your ear down to the Bible, and hear Him bid you go and pull sinners out of the fire of sin. Put your ear down to the burdened agonized heart of humanity, and listen to its pitiful wail for help. Go stand by the gates of Hell and hear the damned entreat you to go to their father's house and bid their brothers and sisters, and servants and masters not to come there. And then look Christ in the face, whose mercy you have professed to obey, and tell Him whether you will join heart and soul and body and circumstances in the march to publish His mercy to the world."  (William Booth)