As Samuel Johnson purportedly wrote, “The true measure of a man is how he treats someone who can do him absolutely no good. - Adam Grant

those who can’t . . . don’t know they can’t. According to what’s now known as the Dunning-Kruger effect, it’s when we lack competence that we’re most likely to be brimming with overconfidence.

The Tennessee experiment contained a startling result. Chetty was able to predict the success that students achieved as adults simply by looking at who taught their kindergarten class. By age 25, students who happened to have had more experienced kindergarten teachers were earning significantly more money than their peers.

When we're determined to reach an objective, it's the gap between where we are and where we aspire to be that lights a fire under us.