Fixed typo in compound-interests-of-learning.org

src/compound-interests-of-learning.org

@@ -7,22 +7,22 @@ the time you invest in learning. If you know *the power of coumpound
 interests*, then you can infer that *the soonest you know something,
 the more value it generates over time*.
 
-Investing 1 hour today to learn something that will make you win 12
-seconds per working day saves you 1 minute per week so almost an hour
+Investing 1 hour today to learn something that will make you spare 12
+seconds per working day will spare you 1 minute per week so almost an hour
 per year for the rest of your career ! Well, I know what you mean, 1
 hour saved per year won't change your life. But guess what happens if you
 invest one hour per week to perfect your workflow ? You literally
 save years, I am not kidding, do the math !
 
-Let's compare someone that doesn't invest in perfecting their
+Let's compare someone who doesn't invest in perfecting their
 workflow and someone who does. Let's say both are given a
 40-years-long task given their current skills (working 7 hours per
 day, 5 days per week, 47 weeks per year (5 weeks off per year)). The
-one that doesn't perfect its workflow will take 40 years to make it.
+one that doesn't perfect their workflow will take 40 years to make it.
 The other invests 1 hour per week in learning, and for each hour
-invested, he wins 12 seconds per day over his workmate. *It will take
-him 9.5 years less than his non-learning workmate to do just as much*.
+invested, they spare 12 seconds per day over their workmate. *It will take
+them 9.5 years less than their non-learning workmate to do just as much*.
 
-A one hour learning session for saving only 12 seconds spared each
-following days doesn't seem much, but it could make you retire 10
-years earlier. That's why *one must learn*.
+A one hour learning session sparing only 12 seconds each
+following day doesn't seem much, but it could make you retire 10
+years earlier.