Many(10) means name&faceless instructors.My song 2

Many people have mind.But they are not applying it within by handwriting.
Many people have subject.But they are explaining it to other/s by voice.

My next song will be like......

Many is to many.
But of no use.
Many have mind.
But no application.
Many have subject.
But no explanation.
So many is not becoming one.