I love the story Cornelius Van Til tells about hearing an Arminian preach (sorry, can't remember where). The Arminian likened salvation to a bus driver coming into town and preaching in the public square through a megaphone, "I'm off to Fort Knox where there's gold enough for everyone. Whomsoever wishes may come aboard my bus and we'll receive the gold together."
I'm trying to remember the details - it's a while since I heard the lecture. But as I remember it Van Til went up to the preacher afterwards and thanked him for a brilliant illustration. "I'd make only one change to it," he said.
Evangelism is basically Ezekiel 37 - prophesying to dry bones. The people are dead. Whomsoever may come. But the star of the show is the Spirit, giving life through the word.