The less intelligent we are in a particular domain, the more we seem to overestimate our actual intelligence in that domain. - Adam Grant

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.

While God created Adam, who was alone, He said, 'It is not good for man to be alone. He also created a woman, from the earth, as He had created Adam himself, and called her Lilith. Adam and Lilith immediately began to fight. She said, 'I will not lie below,' and he said, 'I will not lie beneath you, but only on top. For you are fit only to be in the bottom position, while I am to be the superior one.' Lilith responded, 'We are equal to each other inasmuch as we were both created from the earth.' But they would not listen to one another. When Lilith saw this, she pronounced the Ineffable Name and flew away into the air.

Although many successful givers start from the default of trusting others’ intentions, they’re also careful to scan their environments to screen for potential takers, always ready to shift from feeling a taker’s emotions to analyzing a taker’s thoughts, and flex from giving unconditionally to a more measured approach of generous tit for tat. And when they feel inclined to back down, successful givers are prepared to draw reserves of assertiveness from their commitments to the people who matter to them.