What do I know?

Italics on the do and on the know

Letter to myself, and,  
Clearly, others. This 
Letter may prove long.
A letter is long; it is not
«Note to self,« where 
The "my" is omitted,
Left out because self- 
Explanatory. Or just in
The interest of brevity.
Abbreviations often are,
Brief, that is, in the hope
Of being brief or briefer.
Letter to myself, to get
Back on track and no
Shortcuts, in the interests
Of brevity, of shortening
The inevitable advice, the
Words of wisdom gained
From the years the future
Inexplicably, relentlessly
Piled on, is time now to
Be my teacher, or yours.
Note to self, explore this
Further and farther as 
Time passes. Back to that
Letter to myself, have I
Learned nothing from so
Many years of living? Do
I, must I hesitate to share
Some grain of enlightened
Understanding, my hard 
Scrapped knowledge? Is
Knowing necessary? Or
Knowing better? Am I 
Here to share insights 
That you, too, may have
Made, even some in your
Younger years, your teens
Or thirties? What did I 
Know in my forties that
Wasn't obvious when I
Turned eighteen? Was I
Smarter at 50 than I had
Been then? Are you? Oh,
Remember, I write this to
Myself, not you, not you,
Necessarily, but do play
Along. I was a ridiculously
Serious child. Did that fuel
Frivolousity, okay, not a
Word, as I matured? Am
I so much wiser that I can
Leave hints, the bread 
Crumbs of a life best lived
On your doorstep? A letter
To myself from now to 
Then. From now to Zen?