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Concentration is not only an intellectual thing, it may be found in all the activities of the being, including bodily activities. The control over the nerves should be such as would allow one a complete concentration on what one is doing and, through the very intensity of one's concentration, one acquires an immediate response to external touches. To attain this concentration one needs a conscious control of the energies. <ref>http://incarnateword.in/cwm/04/23-december-1950#p1 </ref>

Without concentration one cannot achieve anything. <ref>http://incarnateword.in/cwm/12/study#p71</ref>