ThecareerofthelateDr。MarshallHallwasalifelongillustrationoftheinfluenceofcharacterinformingcharacter。
Manyeminentmenstilllivingtracetheirsuccessinlifetohissuggestionsandassistance，withoutwhichseveralvaluablelinesofstudyandinvestigationmightnothavebeenenteredon，atleastatsoearlyaperiod。Hewouldsaytoyoungmenabouthim，”Takeupasubjectandpursueitwell，andyoucannotfailtosucceed。”Andoftenhewouldthrowoutanewideatoayoungfriend，saying，”Imakeyouapresentofit；thereisfortuneinit，ifyoupursueitwithenergy。”
Energyofcharacterhasalwaysapowertoevokeenergyinothers。
Itactsthroughsympathy，oneofthemostinfluentialofhumanagencies。Thezealousenergeticmanunconsciouslycarriesothersalongwithhim。Hisexampleiscontagious，andcompelsimitation。
Heexercisesasortofelectricpower，whichsendsathrillthrougheveryfibre——flowsintothenatureofthoseabouthim，andmakesthemgiveoutsparksoffire。