Philosophy - Lostpedia #Honorius of Autun:
Honorius Augustodunensis, also known as Honorius of Autun, was a popular Christian theologian and philosopher. His work, De Imagine Mundi, contains a passage that reads:

There lies in the Ocean an island which is called The Lost. In Charm and all kinds of fertility it far surpasses every other land, but it is unknown to men. Now and again it may be found by chance; but if one seeks it, it cannot be found, and therefore it is called The Lost.

• This would explain why attempts to find the island have been unsuccessful; one can only find it "by chance."
• "Charm" is a word that has been used historically to refer to magic and other supernatural phenomena.
• The island would have to "[surpass] every other land" in fertility in order for a previously sterile Jin to conceive with his wife.