GEORGE BERNARD SHAW

Richard Dawkins introduced the term meme in his classic The Selfish Gene, defining it as a unit of information that spreads via imitation. He noted that memes evolve via natural selection just as in evolution.

The internet has always been a fertile grou...

... but learning is not practice. Unless you apply that knowledge and make a meaningful contribution with it, passive learning is not a form of practice. 

Making mistakes while practising is a great form of learning, because it helps you gain important insights.

Learning is not passive: you can't learn just by taking in information. Without some form of active processing, like teaching, almost everything we read is lost in a short time.