Mainstream Christian soteriology is the study of how God reconciles the separation between man and God due to sin.  Many Christians believe they receive the forgiveness of sins, life, and salvation obtained by Jesus through his incarnation, life, innocent suffering, death, resurrection from the dead, and ascension. Christian soteriology examines how an individual is miraculously saved by divine grace through faith in Jesus Christ, and reconciled to God. Humankind was saved from both physical and spiritual destruction, the resulting condemnation of one’s sin.
Taken from Wikipedia: Soteriology