If you dedicate your attention to discipline in your life you become smarter while you are writing than while you are hanging out with your pals or in any other line of work.
The mind is like a sheet of white paper in this, that the impressions it receives the oftenest, and retains the longest, are black ones.
Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in beer.