If you are like me you have had many people say so you, something similar to the following:
"If what you say about election is true, then proclaiming the Gospel is not necessary, in fact a waist of time."

I usually role my eyes when I hear this, because I know that proclaiming the Gospel is God's means of reaching His elect. However, I have yet to have anyone buy this argument when I say it.

Does anyone have something that they say, when they hear similar arguments that you have found to be helpful in making the hearer/reader understand?