All we know so far is what doesn't work.

We have a habit in writing articles published in scientific journals to make the work as finished as possible, to cover up all the tracks, to not worry about the blind alleys or describe how you had the wrong idea first, and so on. So there isn't any place to publish, in a dignified manner, what you actually did in order to get to do the work, although, there has been in these days, some interest in this kind of thing.

The electron is a theory. But the theory is so good we can almost consider them real.

All we know so far is what doesn't work.

The problem of creating something new, but which is consistent with everything which has been seen before, is one of extreme difficulty.

An ordinary fool isn't a faker; an honest fool is all right. But a dishonest fool is terrible!

Strange! I don't understand how it is that we can write mathematical expressions and calculate what the thing is going to do without being able to picture it.