The <human brain> is like an 'elevator'.
When you get in an elevator,
once you press the button of the 'floor' to which you plan to go,
and once the elevator starts moving, it does not stop midway,
but goes up to the 'floor you have selected'.
<Human brains> too: once they start to operate,
they proceed straight forward to a 'certain stage' without stopping.
Then, ultimately, those thoughts are carried out by the <body> too.