What is the state of true diligence?

A person who applies effort can ponder problems even in the middle of the night, whereas a person who does not apply effort does not ponder problems even during the day. This shows that true diligence is the diligence of the manas; He works regardless of day or night, whereas the diligence of the mind consciousness is intermittent, and at night it can no longer ponder problems. Even if during the day the manas only attends to trivial matters, the mind consciousness still cannot be diligent, for it cannot escape the baton of the manas' command.