Dreams can have qabalistic content if you happen to be the sort of person who feeds their subconscious with qabalistic symbolism.
Your subconscious may be trying to tell you something through a symbol you have deliberately planted within it. This is how the correspondences work as a symbolic language that bridges the gap between your conscious and subconscious mind.
This kind of symbolic communication happens all the time to everyone. The problem is that the majority of the symbols that get fed into the subconscious were picked up at random throughout life, so when the subconscious tries to tell us something we don't know what is being said because we don't understand the symbols being used. Internalising the correspondences is like installing your subconscious with new software, and you've got the user manual.