“The most significant indicator of people’s character comes through their actions over time. Despite what people say about the lessons they have learned (see Howard Hughes), and how they have changed over the years, you will inevitably notice the same actions and decisions repeating in the course of their life. In these decisions they reveal their character. You must take notice of any salient forms of behavior—disappearing when there is too much stress, not completing an important piece of work, turning suddenly belligerent when challenged, or, conversely, suddenly rising to the occasion when given responsibility. With this fixed in your mind, you do some research into their past. You look at other actions you have observed that fit into this pattern, now in retrospect. You pay close attention to what they do in the present. You see their actions not as isolated incidents but as parts of a compulsive pattern. If you ignore the pattern it is your own fault.”

Chap. 4 : Determine the Strength of People’s Character
The Laws of Human Nature (2018)