Unscramble human desires from an ancient’s point of view:
The world “欲” means desires. It has two basic characters. They are:
“谷” means valley;
“欠” means owe something, or not enough.
People’s desires are just like the valleys, no matter how they are filled, they always feel that they owe something.
The so-called “great desire is hard to fill”: excessive desire will lead people to the abyss of sin.