The Scoutmaster guides the boy in the spirit of an older brother.... He has simply to be a boy-man, that is: (1) He must have the boy spirit in him: and must be able to place himself in the right plane with his boys as a first step. (2) He must realise the needs, outlooks and desires of the different ages of boy life. (3) He must deal with the individual boy rather than with the mass. (4) He then needs to promote a corporate spirit among his individuals to gain the best results.
Aids to Scoutmastership (1920)