Concentration has its uses but it is not meditation. In scientific work, in scientific research, in the science lab, you need concentration. You have to concentrate on one problem and exclude everything else — so much so that you almost become unmindful of the remaining world. The only problem that you are concentrating upon is your world. That’s why scientists become absent-minded. People who concentrate too much always become absent-minded because they don’t know how to remain open to the whole world.