If you call on him as Father, who without respect of persons judges according to each man's work, pass the time of your living as strangers here in reverent fear:
According to each man's work ...  This teaching is not peculiar to Peter; Paul declared that "God will render to every man according to his works"  (Romans 2:6).  The notion that being under the grace of God, and being saved by grace through faith, nullifies Scriptures such as these is extremely erroneous.