Well Adam and Eve sinned, going from Perfect to Corrupt, thus spiritually crippling the all of humanity. We hereby deserve nothing but one thing: DEATH. Death is the only thing that can satisfy Divine Justice, on the other hand, no death is good enough to FULLY satisfy this justice. The only thing that can reverse this process of sin and death is the Perfect Sacrifice, the shed blood of a perfect man, TOTALLY SINLESS, which no mere creation can do.
That is why God came himself through Jesus Christ, to be born as the Sinless Man,
the Lamb Without Blemish, the Perfect Sacrifice. Jesus, born sinless, lived sinless,
died sinless, thus fully satisfying God’s sense of Justice, but there’s a catch…One must enter into that sacrifice by accepting Jesus as the Savior.
In dying, Jesus destroyed Death,
In rising, he restored Eternal Life.
Also, I don’t know where your relative got
the idea that “not having to tell our sins to
a priest” deal, that is
TOTALLY wrong, so
let me provide this 8-9 minute video:
**
Why Do Catholics Confess Their Sins to a Priest? **