Summary
The Nature of Eldar Marriage
Highlights
Permanence and Moral Integrity
The Eldar wedded once for all. While many could fall into pride, malice, greed, or jealousy due to the shadow upon Arda, there is no record of an Elf taking another's spouse by force. Such an act was contrary to their nature, and those forced would have chosen to depart for Mandos. Furthermore, guile was virtually impossible, as the Eldar could intuitively discern the marital status of others through their eyes and voices.
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Original text
The Eldar wedded once for all. Many, as the histories reveal, could become estranged from good, for nothing can wholly escape from the evil shadow that lies upon Arda. Some fell into pride, and self-will, and could be guilty of deeds of malice, enmity, greed and jealousy. But among all these evils there is no record of any among the Elves that took another’s spouse by force; for this was wholly against their nature, and one so forced would have rejected bodily life and passed to Mandos. Guile or trickery in this matter was scarcely possible (even if it could be thought that any Elf would purpose to use it); for the Eldar can read at once in the eyes and voice of another whether they be wed or unwed.