According to modern neuroscience, the human brain reaches cellular development maturity at approximately age 30-31. (This is one of the strongest arguments for the unpopular but medically sound proposal to raise the USA legal drinking age to 30.)
Marriage before age 31
It stands to reason, therefore, that marriages accomplished before the age of 31 should be closely supervised by elders who have a much more clearly articulated perception regarding the difference between expectations and ideals.(see previous blogs for explanation )Young marriage partners have not yet fully individualized. They do not, characteristically, have much objective information about the cultural values that they have been raised to internalize. It is not easy for a young person to truly accept that there might be several acceptable and viable ways of responding emotionally to a given social situation. Rather, a young person tends to assume that one was raised in the "right" way by one's own worshipful parents/culture, and that anyone whose behaviors veers from the standards and HABITS with which one was raised in an (unexamined, unanalyzed) family-culture setting must be "wrong" or "crazy". This natural, adolescent respect for own culture tends to be very idealistic.
Longevity of marriage - individuals-self (house 1) remaining legally bound into the property (house4) contract (house7) - is perceived as the highest value of marriage. Naturally longevity of financial investments is one of the best ways to develop capital wealth, and society (house 10) favors long contracts for purposes of system (house 11) stability (house 4). But again longevity is most patently NOT the highest spiritual (house 9) value of marriage. Rather, depth and intensity of the shared (house7) spiritual work between partners is what counts.
Every action has a reaction. Every attraction contains its own repulsion. Ask any good Buddhist = if you are intensely attracted to something now, rest assured you will be intensely repulsed by that same thing in the future!
A significant part of the work of marriage is learning to manage the cycles of desire and contempt one feels toward one's partner over long periods of time.
Whether conventional or unusual in configuration, marriages manifest past-life self-knowledge, with a purpose to complete the incomplete Karma of previous life.