Wilson answers some questions about the vow aspect of marriage in this new post. Conclusion:
If marriage is honorable among all, and the bed undefiled (Heb. 13:4), and if God will judge whoremongers and adulterers, then this means that marriage must be socially and legally visible. There must be something other than the sexual activity which distinguishes the sexual activity which we must all honor, and the kind that God will judge. Given the nature of the case, therefore, there must be vows. The Bible doesn’t tell us what formula the vows must use, but it does require us to develop something that is suitable for the occasion. This is something which our fathers did, and which we are forgetting. We should stop that. We should renew our vows.
(between 2 worlds)