Marriage is a commitment. You are making a commitment to share a life together and have a family together. You ought to know who you are marrying. You ought to understand each others values, beliefs and interests. You ought to know that you can spend a life together and enjoy it. Whether you are seeing someone or your parents are choosing a spouse for you - before you enter marriage you ought to have a genuine desire to be with that person - otherwise you are entering a life of lies.
Although if I were forced to choose between love before or after marriage - after marriage would be better (that is assuming love with the person you are married too). There is no point in being in a relationship without love. In fact if there is no genuine love between the two people - it is no longer a marriage - it is just a domestic contract between two people.
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