The right kind of experience, the right kind of technical training, ought to enlarge the mind..

I refuse to recognize that there are impossibilities. I cannot discover that any one knows enough about anything on this earth definitely to say what is and what is not possible.
The right kind of experience, the right kind of technical training, ought to enlarge the mind and reduce the number of impossibilities.
It unfortunately does nothing of the kind. Most technical training and the average of that which we call experience, provide a record of previous failures and, instead of these failures being taken for what they are worth, they are taken as absolute bars to progress.
If some man, calling himself an authority, says that this or that cannot be done, then a hoard of unthinking followers start the chorus: "it can't be done".