How do you gauge...?

How do you gauge how well you’re handling life?

For example…
Physically I know I’m doing well if my blood pressure, sugar, cholesterol, etc. are all in check.
Financially I can gauge things based on my bank accounts or debts.
Socially I can base things on the quality of my relationships.

But how do you tell how things are going mentally, emotionally, or spiritually with yourself? Human feelings can be so fleeting and fickle: happy one moment, not so much the next.  It’s not something that’s so easy to gauge, is it?

Just something I‘m pondering tonight.