Give a man a fish, and he'll eat for a day. Teach a man to fish, and he'll eat for a lifetime. Anyone who has never made a mistake has never tried anything new. People cannot learn without changing. The only person you can change is yourself.
People learn better when they are happy.
Language learning is a long, straight staircase. Language learning is a walk through a jungle. You can speak English perfectly if you just try hard enough. A classroom's most important resource is the people in it. Everything you know you learned from someone else.