Full Idea
Lovers' vows ought to be publicly declared invalid and marriage denied the pair: and indeed precisely because one ought to take marriage unspeakably more seriously!
Gist of Idea
Marriage is too serious to be permitted for people in love!
Source
Friedrich Nietzsche (Dawn (Daybreak) [1881], 151)
Book Reference
Nietzsche,Friedrich: 'Dawn (Daybreak) (v 5)', ed/tr. Smith, Brittain [Stanford 2011], p.116
A Reaction
Sounds like the traditional aristocratic attitude to marriage, so the idea suits Nietzsche. I think that nowadays it is much wiser to be base proposal of marriage on friendship than on love. You are choosing a life-long friend, not someone to adore.