A personal act or omission that does not conform to God's will or law. Actual sins may be divided into the following catgories: sins of commission or omission, according to the precept which they violate; interior or exterior sins, according to the manner of committing them; sins against God, one's neighbor, and one's self, according to their object; mortal and venial sins, according to their effect on the soul; sins of ignorance, veakness, and malice, according to the cause which leads to them; capital or non-capital sins, according as they do or do not lie at the root of other sins.