so why then do you preach? leave it to god. He has the know-how and the ability surely?
Because God has always dealt with man through men (and women). That which saves a man is the gospel. God just uses man to deliver the mechanism of salvation to man. A message needs a messenger
I 'preach' the gospel and talk about God and who he is and what it is like to know him. He takes the words/ideas that 'preachers' put up and applies them to a persons heart.
I have evidence that convinces me above and beyond the fact that he says this is how he does it (not that I would need any more evidence than his saying so - but he is very gracious, our God).
You see, that's precisely how he did it with me. So I know it works