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.

... it is because one can build a compelling set of arguments - informed by science and thoroughly compatible with it - that to believe in anything despite the complete lack of evidence is, in fact, irrational.

There are clearly people for whom Stoicism immediately "clicks," it comes natural, and others for whom it doesn't. Then again, Stoicism isn't the only positive philosophy of life. Buddhism is an excellent alternative, if it speaks more clearly to one's personality or cultural background.

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.

I believe Stoicism can help anyone who takes it seriously and begins to practice it. It will help them flourish because it will provide them with a compass for navigating life, a general, flexible, framework to set priorities, and a set of techniques to achieve serenity and equanimity.

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.