Humphrey, by investing $2,400/year for 10 years (total $24,000) from age 20-30, is predicted to have a higher total wealth by age 65 than Graham, who invested $2,400/year for 35 years (total $84,000) from age 30-65, illustrating the power of early investment.
"Humphrey contributed only $24,000 total versus Graham contributed $84,000 over the course of his life but yet because of the 10-year Head Start it was Humphrey who still had the higher ending balance"