When I Was Wise

I was wise when I was young
I saw things for what they are
Not as they seem
With some filter of perception
My own perception
Overlayed.
As I grow older
I blame myself more
I self loathe
I do not pity
But I resent myself in my imperfection.
When I was a child
I took my own advice
I was forgiving and kind
And I was wise
For I treated myself the same.
When and where did I lose this
And can I get it back?