In the dilapidated building of an elementary school, the class is on.
The teacher explains something and then asks the children, "Did it enter?".
There is an instant response from the backmost bench: "Only the tail has not entered yet!".
The earnest voice belongs to a boy who has been all along intently watching the struggle of a rat to wriggle out of the class room through a hole in the wall.
It has managed to squeeze in its body, but its tail is still not gone in.
Perhaps the hole is blocked.
These are everyday examples of concentration.
Attention, concentration, meditation-these are different degrees of the same process.
It is fixing the mind on a single object or idea to the exclusion of everything else.
To be continued ...