CONCENTRATION [fr. concentration]
To be able to absorb
and produce
with a good tempo
the artist needs to be very very concentrated.
Pertinence require sharpness as well.
You cannot do brain surgery without being very concentrated
half drunk
or surfing on the internet
looking in your mail box
listening to the football match on the radio while making a trepanation.
Concentration has to be connected with determination.
Concentration is will-power
a dedicated moment.
But dedicated to whom and to which cause?
You also need concentration to find out what the concentration should be about.

1   DICTIONARY   by Thierry Geoffroy / Colonel    ( link to portail )