Someone once said to me that Unitarianism is an empty path. They meant it as a criticism, but I thought it sounded rather positive and Taoist. "The way that can be named is not the true Way" (usually written as "The tao that can be named is not the true Tao", but Tao just means "way").
In "Mind your language", Danny Crosby reflects on the view expressed by a character in The Simpsons that Unitarianism is like an empty bowl. The point about an empty bowl is that you can fill it with whatever you like; it is clean and receptive, and it gives form to whatever fills it.
The point about an empty path is that it is not cluttered up with extraneous symbols, meaningless rituals, and pointless prohibitions.
I like the idea of the empty path, because it reminds me of apophatic theology and the via negativa described by Matthew Fox.