This last line scares me:

And even in the absence of dazzling research outcomes, there’s the old adage that tells us “we grow wiser as we grow older.” It’s true. The role of maturation across the lifespan provides us with more potential for growth and healthy adaptation than most would ever imagine

Im in my 40s and have totally gone backwards in mental growth and health. I peaked mid-30s and literally feel myself decaying both mentally and physically.