Acts16,
6 Paul and his companions travelled throughout the region of Phrygia and Galatia,
having been kept by the Holy Spirit from preaching the word in the province of Asia.
>> What does it mean?
7 When they came to the border of Mysia, they tried to enter Bithynia,
but the Spirit of Jesus would not allow them to.
>> What does it mean?   
8 So they passed by Mysia and went down to Troas.
9 During the night Paul had a vision of a man of Macedonia standing and begging him,
Come over to Macedonia and help us.
>> This is clear - i mean i can understand a dream and the vision of seeing this men but,
why do i not read about what is going on before, that Paul can not preach in the other regions?
10 After Paul had seen the vision, we got ready at once to leave for Macedonia,
concluding that God had called us to preach the gospel to them.
>> CONCLUDING - this is very interesting. Still they were not sure. They thought, this dream is from the Holly Spirit BUT they were not sure.
Is it some times like this, that we trie and trie but it does not work out. So we do not stop trying and then we find a other way and we go there.

Paul and is companions travel through:
Phrygia
Galatia
Mysia
Troas
Every were they tried to preach but they could not>>>WHY?
We don't know - but : THEY NEVER STOPPED TRING - TILL THEY FOUND A NEW GOAL.

What makes me stop preaching?
What makes me stop evangelizing?
Nothing could stop Paul from being on the mission! IT WAS JUST THE QUESTION WERE.