Where has the time gone?

It was just yesterday that I was tying my first shoe lace,
that I was sipping chocolate milk cartons through a plastic straw,
that I was playing make-believe at recess and saving the world for the forty minutes between lessons.
It was just yesterday that I was playing with legos, action figures, and video games,
that I woke up, brushed my teeth, went to school, did my homework, watched tv with my parents, went to bed.
Life was cyclical. It was easy.
It was just yesterday that I learned 1+1, learned what made up the human body, that I learned e does equal mc squared.
I used to create worlds to play in, now I try to be a part of creating change in THIS world.
My world is no longer tiny, blissful, imaginary.
Now that I've seen the light at the end of the hallway called adolesence, called innocence I ask, "Where has the time gone?"
It was just yesterday that I sat idly by, but today I strive for changes.
The world [can be] magnificent. Appreciate it before you ask where the time has gone.