Hehadanextraordinarilyactiveandsuccessfulcareer，amongthefruitsofwhichwerethedistributionofovertwomillioncopiesoftheScripturetext，indifferentlanguages；theequipmentofseveralhundredmissionaries；thecirculationofmorethanahundredandelevenmillionofscripturalbooks，pamphlets，andtracts；thebuildingoffivelargeorphanages，andthekeepingandeducatingofthousandsoforphans；finally，theestablishmentofschoolsinwhichoverahundredandtwenty-onethousandyouthfulandadultpupilsweretaught。InthecourseofthisworkMr。Mullerreceivedandadministerednearlyamillionandahalfofpoundssterling，andtraveledovertwohundredthousandmilesofseaandland。[310]Duringthesixty-eightyearsofhisministry，heneverownedanypropertyexcepthisclothesandfurniture，andcashinhand；andheleft，attheageofeighty-six，anestateworthonlyahundredandsixtypounds。
[310]MyauthorityforthesestatisticsisthelittleworkonMuller，byFredericG。Warne，NewYork，1898。
Hismethodwastolethisgeneralwantsbepubliclyknown，butnottoacquaintotherpeoplewiththedetailsofhistemporarynecessities。Forthereliefofthelatter，heprayeddirectlytotheLord，believingthatsoonerorlaterprayersarealwaysansweredifonehavetrustenough。“WhenIlosesuchathingasakey。”hewrites，“IasktheLordtodirectmetoit，andIlookforananswertomyprayer；whenapersonwithwhomIhavemadeanappointmentdoesnotcome，accordingtothefixedtime，andI
begintobeinconveniencedbyit，IasktheLordtobepleasedtohastenhimtome，andIlookforananswer；whenIdonotunderstandapassageofthewordofGod，IliftupmyhearttotheLordthathewouldbepleasedbyhisHolySpirittoinstructme，andIexpecttobetaught，thoughIdonotfixthetimewhen，andthemannerhowitshouldbe；whenIamgoingtoministerintheWord，IseekhelpfromtheLord，and……amnotcastdown，butofgoodcheerbecauseIlookforhisassistance。”
Muller’scustomwastoneverrunupbills，notevenforaweek。