Before you get married, open two eyes. After that, close one eye. Marriage teaches you forbearances, meekness, patience, thriftiness and a great many things you wouldn't need if you had stayed single. Marriage is like a piano. How well it sounds depends on how well you keep it in tune.
Marriage is like a warm bath.
Once you get used to it, it is not so hot. Marriage is like a besieged castle. Those who are outside try to get in while those who are inside try to get out. Marriage is like a violin. After the beautiful music is over, the strings are still attached.