7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone7 ordinary things, the true meaning of which is not known to everyone