Fruit
We tend to think of "fruit" in two ways in natural language. One is as food that grows on trees and vines, sweet and delicious, and able to be eaten without harming the plant in any way. Another is as the things we produce, what our work yields for the betterment of the world. These are obviously connected: we are like trees, producing things that "feed" the world in some way, just as the tree produces fruit that feeds us. It makes sense, then, that the idea of fruit in the Bible is bound closely to the idea of goodness. Fruits that are eaten represent the desire for good and the energy to do what is good; fruit that is produced is the actual good that we go into the world and do.
Isaiah 13:9-10
9
Behold, the day of Yahweh comes, cruel, with wrath and fierce anger; to make the land a desolation, and to destroy its sinners out of it.
10
For the stars of the sky and its constellations will not give their light. The sun will be darkened in its going forth, and the moon will not cause its light to shine.
