Half as many people will not support half as many enterprises In a given geographical territory, half as many people will not support half as many such enterprises spaced at twice the distance. When distance inconvenience sets in, the small, the various and the personal wither away. Jane Jacobs, The Death and Life of Great American Cities densitydistancegeographybusinesseconomics
The principle of parallel construction This principle, that of parallel construction, requires that expressions similar in content and function be outwardly similar. Blessed are the poor in spirit; for theirs in the kingdom of Heaven. Blessed are they that mourn; for they shall be comforted. Blessed are the meek; for they shall inherit the earth. William Strunk Jr. & E.B. White, The Elements of Style Structural parallelism form