both doubt and certainty are as contagious as the common cold

The inability to experience regret is one of the diagnostic characteristics of sociopaths.

First, philosophy concerns itself with all kinds of issues that don't get much airtime in day-to-day life. What's the nature of reality? Can we ever truly know anything, and if so, how? What does it mean to be a moral agent? And while we're at it, is there any such thing as agency anyway?

without being sure of something, we can not begin to think about everything elses

wrongness always seems to come at us from left field - that is, from outside ourselves. But the reality could hardly be more different. Error is the ultimate inside job. Yes, the world can be profoundly confusing; and yes, other people can mislead or deceive you. In the end, though, nobody but you can choose to believe your own beliefs.

Parading our own brilliance and exulting in other people's errors is not very nice. For that matter, even wanting to parade our own brilliance and exult in other people's errors is not very nice, although it is certainly very human.

both doubt and certainty are as contagious as the common cold