The Existence of Sin
It is frequently said that what the Catholic Church taught
about sin was not always biblical. Catholic Christianity
has always used the Bible as its source for what is sinful.
It is important to state that all sin offends God. With even
the slightest sin in our eyes, we alienate God and are unholy
in his sight.
Matthew 6:24
No one can serve two masters. He will either hate one
and love the other, or be devoted to one and despise
the other. You cannot serve God and mammon.