The Catholic Church professes the absolute
indissolubility
of marriage based on the Bible. The Church has also
taken
on herself to decide if and when marriage occurs.
This process
is called annulment.
There are, as human experience teaches, many
obstacles to
a valid marriage. For instance, if a young woman
were forced
into marriage under fear of death, she would be
incapable of
entering into a valid marriage. Or, a person may attempt
marriage while still married to a third party. These reasons and
others, if proven to have existed, invalidate marriage.