The word "Great" has to be qualified here. Reading the article, I don't believe the author means to say you can "work" your way to actual greatness - say being the best in the world at something, or one of the world's leading experts in a tough field.
Rather greatness here is simply being close to one's true potential. Whether you are Lebron James or a random bench-warmer, the trick is to show up everyday and consistently improve. LeBron is great because his floor is higher than most other player's ceilings. There are many players who can give a brilliant performance on their day, but can't do much on others. If you've watched any sport, the great players are very very good even on their worst days. On their best days, they are unbeatable.
If you can identify the area where you can achieve the same and put in the work, then you're on the path to greatness (at your level).
Rather greatness here is simply being close to one's true potential. Whether you are Lebron James or a random bench-warmer, the trick is to show up everyday and consistently improve. LeBron is great because his floor is higher than most other player's ceilings. There are many players who can give a brilliant performance on their day, but can't do much on others. If you've watched any sport, the great players are very very good even on their worst days. On their best days, they are unbeatable.
If you can identify the area where you can achieve the same and put in the work, then you're on the path to greatness (at your level).