The emotion of disgust evolved initially to optimize responses to the omnivore's dilemma. Individuals who had a properly calibrated sense of disgust … - Jonathan Haidt

Letting off steam makes people angrier, not calmer. Pennebaker discovered that it’s not about steam; it’s about sense making. The people in his studies who used their writing time to vent got no benefit. The people who showed deep insight into the causes and consequences of the event on their first day of writing got no benefit, either: They had already made sense of things. It was the people who made progress across the four days, who showed increasing insight; they were the ones whose health improved over the next year.

Idealism easily becomes dangerous because it brings with it, almost inevitably, the belief that the ends justify the means. If you are fighting for good or for God, what matters is the outcome, not the path. People have little respect for rules; we respect the moral principles that underlie most rules. But when a moral mission and legal rules are incompatible, we usually care more about the mission.

"It is impossible to analyze "the meaning of life" in the abstract, or in general, or for some mythical and perfectly rational being. Only by knowing the kinds of beings that we actually are, with the complex mental and emotional architecture that we happen to possess, can anyone even begin to ask about what would count as a meaningful life."