Given the power and influence that science increasingly has in our daily lives, it is important that we as citizens of an open and democratic society learn to separate good science from bunk. This is not just a matter of intellectual curiosity, as it affects where large portions of our tax money go, and in some cases even whether people’s lives are lost as a result of nonsense.

I don't see any Stoic practice as problematic or risky, but I would advise to engage in extreme versions of the negative visualization exercise only if you are an advanced practitioner. The negative visualization is a meditation during which you visualize, slowly and deliberately, something bad or discomforting happening to you.

"Fate permitting" is a standard Stoic phrase meant to remind ourselves that planning things is up to us, but the ultimate outcomes are not under our control. It helps us to develop an attitude of equanimity toward the universe. We should very much try to change things for the better, that's the whole point of the Stoic discipline of action.

The Stoic discipline of action, which is connected to the virtue of justice, says that we ought to treat others fairly and we should engage in social and political activity. This is further supported by the Stoic idea of cosmopolitanism, and by the famous "circles of concern" identified by Hierocles, who counseled that we should refer to other people as brothers and sisters, to constantly remind ourselves that we are members of the same human family.

In my mind, there is no reason why Stoicism shouldn't become as popular as Buddhism, especially in the Western world, where the dominant culture, Christianity, itself absorbed a large number of elements from Greco-Roman Stoicism.

We still live in a world of such gross injustice and inequality, that only privileged people like ourselves can afford to think of eros and art as top concerns in life. They are important, for sure, but I think it's high time to shift priorities around, away from selfish indulgence, and toward more concern for the wellbeing of so many others who suffer atrocities, injustice, and famine, all over the planet.

The downside of skepticism: it can easily turn into an arrogant position of a priori rejection of any new phenomenon or idea, a position that is as lacking in critical thinking as the one of the true believer, and that simply does not help either science or the public at large.