When you’re solving old problems, the older the problem, the older the solution.
If you’re learning how to code or fly a plane, absolutely, you should read something written recently, because the problem (and the solution) was created in the modern era. But when it comes to age-old questions like how to be healthy, how to stay calm, what kind of value systems are good, how should you raise a family, the older solutions are generally better as they withstood the test of time. Any book that survived for hundreds or thousands of years has been filtered by a lot of people.
Marcus Aurelius’ Meditations is one such example. Written 2,000 years ago, Meditations is filled with wisdom, practical guidance and profound understanding of human behaviour that remains relevant to this day.