An interesting thing to ponder:

It is to be hoped that this book reaffirms the worth of implicit communication; not everything that needs to be said needs to be said outright. Some things, indeed, cannot be directly told: like happiness which ‘writes white’ they vanish when put into words.

I have often thought fun is the same way. "I don't believe in fun," see, that is to say, fun is implicit. It is the white space - much like slack - which must surround all of the speaking, working, doing. The pursuit of fun, entertainment, happiness is a circular pursuit: the dog's tail. Slack works the same way - you cannot 'seek' slack. A slack seeker is called a slacker. You must have some slack, or like an over-stretched rubber band - you break. You cannot avoid it; you must not be without it. Likewise if things are not entertaining, we lose interest. But if our own entertainment is the purpose for which we are doing something - anything - it becomes vanity.

Or so I'm boldly claiming.

About implicit things - we may be transmitting memes we are unaware of - implicit from those who taught us, implicit in us, and implicit in the recipient. Know thyself, indeed!