Our progress is defined by quantity through life : of our job, money, holiday, women and God knows what but our imaginary goal is always more. It's not, “ I need more quality at work, more quality rest “, it's just quantity.
You spared you money during 10 years in aim to invest in private job. If I suggest you to invest in your business which will refunds you all invested money for 5 years, you will say “perfect”. What if I suggest to you instead that all you invest will be back for 2 years you will say: “ah, that is fairy tale”.