The minds of present time kalyuga are considered as very very weak as the human had gone far away from prefect chanting of Vedic Rudra mentras. The mentality of any human body depends upon the language he speaks and India being a spiritual country bears plenty of languages, as a result plenty of mentality people live in this country.
In the same way Japnees have their own mentality where as Americans have their own. This is very clear that the sound produced by the human body has direct effect on mind and brain. In anger a human shouts bad words loudly, by the efect of which the mind becomes weak and the negative thinking of brain gets developed for ever and for whole life.
On every thought of mind the brain will start thinking negatively and by this, the body will perform bad actoins and it will give very bad result and it will make human unhappy due to weakness of mind and negative thinking will perform bad actions by which human will suffer a unhealthy life.
The mind perform the main role so it should be powerfull and other than that there is no other way to make any ones mind powerfull. The perfect sound produced during chanting of Mantras hits the mind and the sound energy makes the mind powerfull.
The powerfull mind enjoys a happy and healthy life. As these mantras grow all powers like concetration, ananlising, dessision, cognition undrestanding and memory power of human mind and there is no other way to make mind of human body powerfull.
It is wonderful how much time good people spend fighting the devil. If they would only expend the same amount of energy loving their fellow men, the devil would die in his own tracks of ennui.
How to Grow Metnal Powers of Mind