How to Own Your Own Mind

He began selling insurance after an accident which incapacitated him

Most people allow the faculty of imagination to atrophy, through neglect.

the balls could be melted conveniently

The chemist and the physicist resort to the same method

Scientific research and experiment would hardly be practical if hypothetical cases were not utilized

put their imaginations to work by setting up hypotheses of facts

definiteness of purpose, backed with a form of persistence that assumes the proportion of an obsession