“There is no great person in history who gained mastery in a particular skill without first investing so much time into perfecting that skill.” WorldLifePurposeTimeHumanityWorkWealthPovertyHistoryGreatnessProduceCallingSkillsWasteInvestmentValueProductivityConversionGiftGreatMasteryProductConvertPersonTime InvestmentSkill Perfection Book:How To Become Great Through Time Conversion: Are you wasting time, spending time or investing time? Source: How To Become Great Through Time Conversion: Are you wasting time, spending time or investing time?