Marriage is the reunion of the separated duad.Originally you were one.You are now two in the world,but the recognition of the spiritual identity is what marriage is.
Its different from a love affair.
It has nothing to do with that.Its another Psychological plane of experience.When people get married because thay think its a long-time affairs,they will be divorced very soon, because all love affairs end is disappointment.
But marriage is recognition of a spiritual identity .
If marriage is not a first priority in your life,you are not married.

The marriage means the two that are one,the two become one flesh.

If the marriage lasts long enough,and if you are acquiescing constantly to it instead of to individual personal whim,you come to realize that that is true -the two really are one.

Marriage is a relationship. When you make the sacrifice in marriage, you’re sacrificing not to each other but to unity in a relationship. The Chinese image of the Tao, with the dark and light interacting-that’s the relationship of yang and yin, male and female, which is what a marriage is. And that’s what you have become when you have married. You’re no longer this one alone; your identity is in a relationship. Marriage is not a simple love affair, it’s an ordeal, and the ordeal is the sacrifice of ego to a relationship in which two have become one.

“A love affair has to do with immediate personal satisfaction. But marriage is an ordeal; it means yielding, time and again. That’s why it’s a sacrament: you give up your personal simplicity to participate in a relationship. And when you’re giving, you’re not giving to the other person: you’re giving to the relationship. And if you realize you are in the relationship just as the other person is, then it becomes life building, a life fostering and enriching experience, not an impoverishment because you’re giving to somebody else … This is the challenge of a marriage.”

the mass of humanity can’t recognize them as truth.

The case is similar to what happens when we tell a child that newborn babies are brought by the stork.
Here ,too,we are telling the truth in symbolic clothing, for we know what the large Bird signifies.

But the child does not know it.He here only the distorted part of what we say and feel that he has been deceived, and we know we know how often is distrust of the grown ups and his refractoriness actually take their start from this impression.We have become convinced that it is better to avoid such symbolic dusguisings of the truth in what we tell children and not to withhold from them a knowledge of the true state of affairs commensurate with their intellectual level.

“The TRUTH CONTAINED in religious doctrines are often all so distorted and systematically disguised__Sigmund Freud,

Anyone who has experience of mystery,knows that there is dimension of universe that is not that which is available to his senses.

In this world , everything is in duality form.

Day-Night
Being -Non being
Conscious -Unconsious
Likewise.
There is a world whuch is available to our senses.
But there is world which supports visible word.that world is not available to senses of the body.