How do you learn to roller skate? Certainly not just by reading instructions and watching otthers, although these may help. Most certainlly, you learn by skating. And if you are a good learner, by thoughtful skating, you pay attention to what you are doing, capitalize on your strengths and work on your weakness.

(Perkins, David ; Blythe, Tina .(1994). Putting Understanding Up Front in Educational Leadership; Feb 1994; 51:5 ; page 4 - 7