'I know myself better'

"I experienced this and that. And now, I know myself more"

Or
it's just that our character is formed in a certain way. And we can just see the shape of ourselves more clearly

Being formed
inflexible
unaccommodating
fixated
stiff
uncompromising.........

.........perhaps "I know myself" is just a sugarcoated way of saying about these declines & decays

(* As I get older, I can certainly distinguish "What I like" and "What I don't want to accept" much quicker, much faster. But I am hesitant, very hesitant, to call it "progress" or "being mature" or "I know myself better")