Vatican Council II expressed the purpose of the sacraments
and the relationship between
Christ acting and the reception
of the sacraments.
Constitution On
the Sacred Liturgy, 59
"The purpose of the
sacraments is to sanctify, to build up the
Body of Christ and, finally, to
worship God. Because they are
signs, they also instruct. They
not only presuppose faith, but
by words and objects they also
nourish, strengthen, and
express it."
Constitution On
the Sacred Liturgy, 7
"He (Jesus) is present in
the sacraments by his power, in such
a way that when someone
baptizes, Jesus himself baptizes. "