By Remez Sasson
Accepting the idea that you are not the mind is a great step toward mental mastery, better concentration and meditation, and the attainment of inner peace. You realize this idea as a fact, after you develop the ability to focus your mind in accordance with your will. Being able to direct your mind according to your will is a proof that you are not your mind, but something higher and above it.
Concentration and meditation require the ability to focus the mind, otherwise you will be constantly distracted and your mind will move from one thought to another, and that is neither cocentration nor meditation.
By practicing concentration exercises and learning to direct the mind according to your own will, you prove to yourself that you are not the mind. You realize that you are separate from the mind, otherwise how can you master it? It is you, the real you that is directing the mind. The ability to focus the mind or stop its activities in accordance with your will, awakens the understanding that you are not your mind, and this understanding helps both concentration and meditation, and is a great step toward self-realization.
Here is an excerpt from the book ‘Meditation – An Outline for Practical Study by Mouni Sadhu, where he speaks about this subject:

