There is heresy in our churches, in our doctrinal beliefs, and in what we practice and believe as Christians. These web pagez has lotz of linkz to great articles on these topics.
"In our day such false groups might refer to themselves as Messianic Restoration, Sacred Name, Hebraic Root or some other similar description exalting Old Testament Jewish worship, holy days, customs, etc. They also seem to magnify the Torah (the first five books of the Bible) and even sometimes ludicrously claim the New Testament was written in Hebrew." - read the rest of this article referring to Christians who try to hold on to the old mosaic laws.
http://www.evangelicaloutreach.org/galatianism.htm
Apostasy (a falling away from the faith) can only happen to believers who once stood in the faith.
When does the rapture take place? Read this article for the truth of what scripture sayz..