'Finish' in the Bible

And He said to them, “Go and tell that fox [that sly, cowardly man], ‘Listen carefully: I cast out demons and perform healings today and tomorrow, and on the third day I reach My goal.’

For which one of you, when he wants to build a watchtower [for his guards], does not first sit down and calculate the cost, to see if he has enough to finish it?

saying, ‘This man began to build and was not able to finish!’