The world is to each one of us the world of individual perceptions.
You are like a radio receiving station. Every moment thousands of impressions are reaching you. You can tune in on whatever ones you like -- on joy or sorrow, on success or failure, on optimism or fear. You can select the particular impressions that will best serve you, you can hear only what you want to hear, you can shut out all disagreeable thoughts and sounds and experiences, or you can tune in on discouragement and failure and despair.
Yours is the choice. You have within you a force against which the whole world is powerless. By using it, you can make what you will of life and of your surroundings.