The Power of Concentration - Learn How to Concentrate Q. Dumont Theron Q. Dumont

It is of the utmost value to learn how to con­centrate. To make the greatest success of anything you must be able to concentrate your entire thought upon the idea you are working on. The person that is able to concentrate util­izes all constructive thoughts and shuts out all destructive ones... Это и многое другое вы найдете в книге The Power of Concentration - Learn How to Concentrate (Q. Dumont Theron Q. Dumont)