diff --git a/README.md b/README.md
index 48a312a..5177c26 100644
--- a/README.md
+++ b/README.md
@@ -598,6 +598,8 @@ A small group of programmers wants to change how we code—before catastrophe st
 > Don’t let anyone tell you how much you should charge for your work
 > value your work and believe that despite the fact that haters are loud, you’re still gonna get a lot of customers who would gladly pay for what you made.
 * [Daniel Miessler](https://danielmiessler.com/blog/job-losses-automation-active-passive/) - (2019) Job Losses from Automation Are Being Actively Engineered and Funded
+* [Seth Godin](https://seths.blog/2009/05/ignore-sunk-costs/) - (2009) Ignore sunk costs
+> * When making a choice between two options, only consider what’s going to happen in the future, not which investments you’ve made in the past. The past investments are over, lost, gone forever. They are irrelevant to the future.
 
 > Tools
 * [Nintendo eShop price comparator](https://eshop-prices.com/prices?currency=EUR) - Find the cheapest price for your favourite game, all prices are in Euro.