Personal development is to become more capable over a lifetime.
It takes time and effort for us to learn, no matter how long we live for.
This mechanism in life includes everyone: all cultures, all beliefs, all genders, all ages.
To be healthier and happier, it is within challenges in our own lives that we need to explore.
Everyone develops at different rates.
We can tell we need to work on ourselves if we are experiencing symptoms of stress or anxiety.
This could be related to feelings of unhappiness in areas of our lives (not limited to):
Emotional & physical health
Personal & professional relationships
Job & entire career