It's Bernard Shaw who is a cynic! 

Those who do it not always can teach it to others. For example, I learned playing chess way back when, but could never teach it to my kids, who learned the game from school's chess  club! 

While those who teach not only can do it but also go the extra mile to ensure others will follow after them. Like what's happening with you and us in CSCIE-12 this semester.

Looking forward to your javascript class, Mike. Love your conversational, crisp and clear writing style! 

- Fehmida