Marriage is a legal bond between two people, and provides those people with certain rights and obligations against each other. The only way to terminate these rights and obligations (as much as possible), is for the parties to obtain a divorce from each other. A divorce therefore legally terminates a marriage. Once a divorce is granted, each partner may then legally marry someone else.
There are only two grounds for divorce:
– the ‘irretrievable breakdown’ of the marriage;
– the mental illness or continuous unconsciousness of one partner
[Source] South African Legal Advice