KNOWLEDGE IS NOT THE SAME AS KNOWING?! The English vocabulary has a lot of limitations which are sometimes the cause of our pitfalls. I was trying to do some carpentry the other day using mostly a hammer when I hit my thumb and thankfully I wasn't hurt. The manual of instructions for using a hammer, I am sure, doesn't say: concentrate on the "nail", otherwise you might hit your "nail"(what an old and obsolete language English is!). I am sure my confidence after "trying" is always higher than when I only read the manual.
After graduating from college, I immediately got a job at a bank as a "settling clerk" which is the English word (to stroke one's ego) for "messenger boy". At this job, I knew everything about balancing total amounts of checks that a branch received and gave out; and make various book entries to reconcile with head office at day's end.
But I was always being reprimanded because college did not teach me that the boss who is also the owner is ALWAYS right. She would order me to buy her food for lunch or bring her back some personal package from the head office which I purposely forgot doing because I hated doing them. College did not teach me that I have to help the supervisor with his work (which is not part of my work) otherwise he would hide one or two of my incoming checks which will leave me looking for them for hours and delay my going home.
I also learned in college that when I then become the Boss, I only have to order around my people. Now that I am the boss, why is it that I still put out the garbage(otherwise I would stink) from the office? What I learned is not exactly the same as what I know.