Though we prize the preached word, we Calvinists are not always the best at communication to those who are not already with us.
I can speak from experience. Even after I'd become a convinced Calvinist, I continued to find that Calvinists had some awfully dogmatic odd opinions that they virtually never explained — certainly never explained well. (This first will be a specific example.)
I puzzled my way to answers, but not easily. I'm now pretty convinced that a lot of folks who I heard snorting these positions did so themselves because all the other CCKs (Cool Calvinist Kids) also snorted them. They wanted to fit in.
This series (probably both short and very occasional) will be about those kinds of positions and statements.
I'm going to introduce a few such popular Calvinist positions, and open the meta for advocates of those positions to explain the rationale in under two hundred words. Speak in words any Christian can understand. Do not preach to the choir. Be pointed, plain, precise, helpful.
There are no prizes except the knowledge that it may help literally thousands of people express truth better. I'll try to pick a winner. Or a few winners.
NOTE: I will only allow answers, or discussion of answers. I do not plan to allow argument about the position. That isn't the point of these posts.
What in the world is wrong with an altar call? Don't Calvinists believe in evangelism? Don't you believe in preaching the Gospel? Don't you believe in calling sinners to Christ? Didn't Jesus say we should confess Him before men (Matthew 10:32)? Didn't Paul say confession with the mouth was essential to salvation (Romans 10:9)?
What is your better idea?
Answers should address all these points.
Remember: discussion, on-topic, 200-word limit.