The message of Salvation is found in The Most Holy & Sacred Book of Mormon and is supported by the New Testament, although the New Testament lacks simple instructions regarding Baptism and Communion. The assurance of those who place their faith and hope in Jesus, who follow through with the outward ordinance of baptism (after repentance), is confirmed in both New Covenant records and is simple beyond measure and is not about works, i.e., church attendance or service.
The Most Holy & Sacred Book of Mormon confirms its simplicity by the following:
And behold, I have given you
THE LAW and THE COMMANDMENTS of MY FATHER
THAT ye shall BELIEVE in ME, and
THAT ye shall REPENT of your SINS and
COME unto ME with a BROKEN HEART and
a CONTRITE SPIRIT
Behold, YE HAVE THE COMMANDMENTS BEFORE YOU (3 Nephi 12:19)