Most of the gains in life come from short-term painful challenges. The human brain is naturally inclined towards instant gratification, but true breakthroughs often occur at the critical point of delayed gratification. The essence of learning is the continuous process of correcting mistakes; the value of correcting errors 1000 times far exceeds that of repeating something for 10,000 hours. The most scarce resource in life is not time, but attention. If you focus 99% of your attention on something, you will surpass 99% of people in that area. No one can defeat you in being yourself.