In your 40s you aren’t really that old but definitely not young anymore. You are at that anvil of life where you start realizing that your efforts have been directed rightly or wrongly. You are at that juncture where turning back and making a fresh start is difficult. So much water has passed by. Either in relationships or career, you are set on a path. All that can be done is either seek improvements on the chosen path or keep making compromises. You are at that juncture where on one hand you feel sad at things left unachieved, yet glad that you still are physically strong enough to do things on your own. You still earn and that adds to your feeling of self-esteem.
Dreading that age of 60, 70 or 80 where you become so fragile and infirm that you need someone to support you all the time. Can still achieve but feel frustrated at things which cannot be changed and now wishing that you had taken risks and chosen a path that you had desired, not succumbing to pressures of life. In the middle of life and from here things cannot be bettered…physically your health is only going to deteriorate. Imprisoned by these circumstances and making the best of what you have till it lasts…that’s what being 40 is about.