The cognitive gap between spouses is the hardest gap to endure in a marriage.

The reason many couples end up in a mess has nothing to do with money or trivial matters—it’s that the two are not on the same cognitive level.

The one with lower cognitive ability tends to show several very real traits:

1. They cannot understand long-term considerations, only focus on immediate gains and losses, with a narrow vision and rigid thinking.
2. They never self-reflect; when conflicts arise, they always blame others and never examine themselves.
3. They naturally drain and pull you down. You see things clearly, know how to be tolerant and plan ahead, while they only hold you back and create internal friction.

You are at a higher level, think further ahead, consider the big picture, and are willing to compromise and yield; but the other person only judges you with their narrow standards.
When you reason with them, they think you are being pretentious; when you plan for the future, they think you are messing around; when you are tolerant and give in, they instead conclude that you are weak and stupid.

What hurts even more:
Deep down, they envy and resent your clarity, even hate you.
In their logic: If you didn't think differently or have too many demands, there would be no conflicts. All the setbacks in life are blamed on you, the "smart person." They never realize that it is their own cognitive limitations that trap their lives.

Cognitive ability is something outsiders cannot teach, and time cannot polish.
It does not automatically become clearer with age; instead, people become more stubborn as they grow older, and deeply ingrained views are hard to change. If you try to pull them forward, they will only desperately drag you back into their lower-level thinking. The family's pattern and the direction of life will instead be swayed by their short-sightedness.

If you refuse to compromise without limits, the home will be filled with constant quarrels and accumulated resentment.
But if you keep yielding and are tolerant, it will continuously drain you, slowly eroding your confidence and vision.