I think INFP's are like rock (The sweet/candy) Sweet all the way through.
INFJ's are like Gob-stoppers. Fuck knows what's going on in there. Could just be a painted marble.
I know what's going on in my subconscious and can control it to some degree, but there's doors in there that won't open until they're ready. It's like having eight different people in my head and I only control one of them. It's chaos.
INFP's seem to be happy with who they are and I envy that.