> True love is like an apparition of spirits: everyone talks about them, but few have seen one.
This is awkward because "love" is non-count, "apparition" is singular, and "spirits" is plural, and because "them" is plural and "one" is singular. There are better variants of this sentence, so I suggest deleting this variant.
added by csabus, January 22, 2015
deleted by AlanF_US, March 11, 2020