This quote is saying that love is something that cannot be put into words. The speaker wishes they had more words to express the feelings of love that they have, but all they can think of is the way their special someone moves when they are sleeping and there is no way to explain this accurately with words. The quote is also making a comparison to the ancient Egyptians and Eskimos, who had a large vocabulary for sand and snow, respectively. By comparing the speaker’s feelings of love to sand and snow, it shows that they lack the language to properly express their feelings.