I would like to introduce you to a notion called "psychic fluid". I have some doubts about the existence of this thing. Your comments are welcome.
What is psychic fluid ?
Let us imagine a person who draws a square with a pencil. The psychic fluid of the square comes from the brain, it goes through the nerves and muscles, then through the tool, then it lets a mark : the drawing of the square.
Let us now imagine a person who wants to lift a 150 kg statue of Poseidon. This person will fail. But if there is a pulleys system, the psychic fluid will be able to pass, and the statue will be lifted.
With only arms, the psychic fluid is blocked.
But with the pulleys system, the psychic fluid can pass.
The psychic fluid moves within the psychic space. The psychic space is made of hard places, but also of numerous wonderful lands to discover.