Is every believer assured a home in Heaven if he accepts Christ as his saviour.

I was reading this article and was confused on some statements.  Please help me to understand why the writer is upset with Dr. John MacArthur.

Is every believer  assured a home in Heaven if he accepts Christ as his saviour.  According to Dr John MacArthur, one's salvation is DEPENDENT upon the life he or she lives.  

http://www.jesus-is-savior.com/False%20Doctrines/Lordship%20Salvati...