The purpose of the old covenant was that human beings live uprightly, love mercy, and walk humbly with God. In many cases the Israelites did not mix faith with the Law of Moses. They strained over the letter of the Law and "swallowed camels" of unrighteousness by ignoring justice, mercy, and faith.
The purpose of the new covenant is that human beings live uprightly, love mercy, and walk humbly with God. In many cases Christians do not mix faith with the grace of God. They present the "four steps of salvation" as an escape from Hell and a ticket to Heaven and ignore the importance that God always places on justice, mercy, and faith, viewing righteous behavior as "works" that must not be added to God’s "grace."
Divine grace is being presented as an alternative to righteous behavior instead of what it is in actuality—an alternative to the Law of Moses.
We are in a time of tremendous moral confusion because we Christians do not understand the new covenant.