As you think, so you become. As are your thoughts, so must be your life. The world around you is only what you believe it to be. Your circumstances and environment, your states of happiness and misery, are effects of your own thoughts. The limit of your thought is the limit of your possibilities.
You can change your present state by your own thoughts. Improve your thinking. Better thoughts bring better actions. Entertain only thoughts that are helpful and useful. Useful thoughts are stepping-stones to spiritual growth and progress. People with negative moods of depression, anger and hatred do positive injury to others. People with hope, confidence and cheerful spirits attract thoughts of a similar nature from others. They are a blessing to society.
The thoughts you create in your mind and the images you form in your daily life help you in making what you are or what you would become. Positive overcomes and overpowers negative. A positive thought drives off a negative one. Courage drives off fear. Love destroys hatred. Generosity drives away miserliness and greed. Magnanimity destroys petty-mindedness and jealousy. Unity annihilates separateness. Keep yourself always positive.