“Life begins at 40” is a phrase that celebrates the positives of life as a “real” adult. When you’re 40, you don’t have many of the worries (real or imagined) that you had when you were 20 or 30. You’re often established in your career. You’ve accomplished things. You’ve learned what’s important and what’s not. You’ve established your own priorities. You often have a degree of financial stability that you didn’t when you were younger. You have more freedoms – – if you have children, they may not be toddlers anymore and are often self sufficient or grown. You often have the financial freedom to travel or the mental freedom to understand that you don’t want to. You’ll dance like nobody’s watching at a wedding just because you’re happy and you want to, and you’re not worried about looking cool. You’ve lived through loss and you have learned to let the people that you love know it, because you understand that life’s not forever, and that life’s what you make it.

Yep, life begins at 40.

RE:
what does "life begins at 40" mean?
specifically, what does "life begins at 40" mean in a MANAGEMENT perspective?