No one can fully appreciate God's plan of salvation without a solid understanding of mankind's sinful nature, John Wesley contended. Here is the key to understanding the divine response to original sin and the difference between sin "properly so-called" and "sins of ignorance" or mistakes. Here, also, is the foundation for such Wesleyan concepts as infant salvation, temptation without sin, and diverse punishments for original sin vs. willful sin. This is a "must read" for all who would fully understand the depths which God's grace goes to redeem the soul.