Practice is absolutely necessary. You may sit down and listen to me by the hour every day, but if you do not practice, you will not get one step further. It all depends on practice.

It is the calm, forgiving, equable, well-balanced mind that does the greatest amount of work.

There is no limit to the power of the human mind. The more concentrated it is, the more power is brought to bearon one point.

The cheerful mind perseveres and the strong mind hews its way through a thousand difficulties.

He who struggles is better than he who never attempts.

The infinite library of the Universe is in your mind.