Enthusiasm moves mountains. Nothing worthwhile can ever be achieved without it. Once you have made yourself enthusiastic about learning, once you have filled your mind with the benefits of acquiring knowledge, you will have no difficulty in concentration.
The material will take charge of your mind. As Peale has it, “Enthusiasm releases the drive to carry you over obstacles which you could otherwise never hurdle. It tones up your physical vitality and keeps you going even when the going is hard. It invests the ups and downs of daily life with come-back strength and adds significance to all that you do.”