Like Velcro

My brain was once like Velcro;
Each tidbit added stuck
And waited there, accessible
For me to find and pluck.

But all the space got taken;
The Velcro’s been replaced
By ancient masking tape from which
The glue has been erased.

So new additions do not stick
And cannot be retrieved.
Had I been warned when I was young,
I wouldn’t have believed.

Yet all things have their limits
And this, too, goes for the mind.
The more we age, the more we leave
What we once knew behind.