The mind comes to take on the nature of the influences which dominate it. It is essential for you to encourage the positive emotions as dominating forces of your mind, and discourage and eliminate negative emotions.
One comes to believe what one repeats to one’s self, whether the statement be true or false. If you repeat a lie over and over, you will eventually accept the lie as truth. You will believe it to be the truth. Everyone is what he is because of the dominating thoughts which he permits to occupy his mind. Thoughts you deliberately place in your own mind constitute the motivational forces, which direct and control your every movement, act, and deed.
We are what we are because of what we think and believe.
Resolve to throw off the influences of negative energy, and build your own life to order.
The subconscious mind makes no distinction between constructive and destructive thought impulses. It works with the material we feed it, through our thought impulses. The subconscious mind will translate into reality a thought driven by fear just as readily as it will translate into reality a thought drive by courage or faith.
Auto-suggestion will lead you to peace and prosperity or misery, failure and death.
If you fill your mind with fear, doubt and unbelief in your ability to connect with and use the forces of infinite intelligence, the law of auto suggestion will take this spirit of unbelief and use it as a pattern by which your subconscious mind will translate it into its physical equivalent.
– Napoleon Hill, Think and Grow Rich