You write five different things, and none of them work, and then suddenly something does, and you ask yourself, 'Why did that last one work?' I think that's the way the artistic mind works. All writers and artists of all kinds often don't know why things work.
Nobody sits down and says, 'Well, I'm going to write a bad book.' They sit down to write a great book, but it doesn't always turn out like that. The writer may do his best and still write a so-so book, and other times, it just flows easily. But I don't know how you can control that.
We may say that a basic substance is one which has a lone pair of electrons which may be used to complete the stable group of another atom, and that an acid is one which can employ a lone pair from another molecule in completing the stable group of one of its own atoms.
Sometimes I think that our laboratories are but little earthworks which men build about themselves, and whose puny tops too often conceal from view the Olympian heights; that we who work in these laboratories are but skilled artisans compared with the man who is able to observe and to draw accurate deductions from the world about him.