Learning is finding out what you already know. Doing is demonstrating that you know it. Teaching is reminding others that they know just as well as you. You are all learners, doers, teachers. We act as though comfort and luxury were the chief requirements of life, when all that we need to make us happy is something to be enthusiastic about.
Fear is that little darkroom where negatives are developed.
There is no such thing as a problem without a gift for you in its hands. You seek problems because you need their gifts. Argue your limitations, and sure enough, they're yours. You are never given a wish without also being given the power to make it true. You may have to work for it, however.