The conscious mind is like the navigator or captain at the bridge of a ship. He directs the ship and signals orders to men in the engine room, who in turn control all the boilers, instruments, gauges, etc. The men in the engine room do not know where they are going; they follow orders. They would go on the rocks if the man on the bridge issued faulty or wrong instructions based on his findings with the compass, sextant, or other instruments. The men in the engine room obey him because he is in charge and issues orders which are automatically obeyed. Members of the crew do not talk back to the captain; they simply carry out orders.
The captain is the master of his ship, and his decrees are carried out. Likewise, your conscious mind is the captain and the master of your ship, which represents your body, environment, and all your affairs. Your subconscious mind takes the orders you give it based upon what your conscious mind believes and accepts as true.
When you repeatedly say to people, “I can’t afford it,” then your subconscious mind takes you at your word and sees to it that you will not be in a position to purchase what you want.
~ Joseph Murphy, The Power of Your Subconscious Mind (1963)