Every second you spend thinking about what somebody else has is taking away from time that you could create something for yourself.
C.S. Lewis once described humans this way: “We are like eggs at present. And you cannot go on indefinitely being just an ordinary, decent egg. We must be hatched or go bad.”
Navy SEALs discovered that most people quit right around 40% of their actual capacity. This “40% rule” tells me one thing — don’t trust yourself when you first want to quit.