A reference to those who subscribe    to the doctrines of John Calvin (1509-64), who taught the concept of unconditional    predestination, limited atonement, and irresistible grace, sometimes referred to as    eternal security.

Communion is a memorial supper of bread and  wine, symbolizing the broken body and shed blood of Jesus. "The cup of blessing which    we bless, is it not the communion of the blood of Christ? The bread which we break, is it  not the communion of the body of Christ?" (1 Cor. 10:16).

One who has been "converted" as a Christian by placing faith in Jesus Christ. "Assuredly, I  say to you, unless you are converted and become as little children, you will by no means  enter the kingdom of heaven" (Matt. 18:3).