I can't think of any better way to prepare oneself for a lasting, fulfilling relationship than the life of a Hermit. Getting to know oneself intimately, finding one's own truth and living it, weeding out the extraneous things---not only makes one the ideal partner but also prepares one for recognizing the right partner when he (or she) comes along. I'm sure the Hermit gets lonely and goes through a dark night of the soul, for sure, but he has the option of ending his hermeticism at some point. He's not shining his lantern around thinking "Juliet, Juliet, where art thou Juliet" because that's not the point of his isolation, but on the other hand, the truths he finds for himself and the light he shines on the path might lead his perfect mate to him after some time and certainly prepares him if it happens.