You can achieve any realistic goal if you continue to think about it. Your subconscious will act on the information it is receiving. Your RAS also cannot distinguish the difference between real events and synthetic reality. Visualizing does work if you believe but it must be used consistently. So it is very important that the picture of your goal is detailed to your conscious mind. Your self-image must also be fitting with your goals or the message will not make it to your subconscious. In other words, the picture of your goal must get clearer every day!