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.
Joel 2:18-27
18
Then Yahweh was jealous for his land, And had pity on his people.
19
Yahweh answered his people, "Behold, I will send you grain, new wine, and oil, and you will be satisfied with them; and I will no more make you a reproach among the nations.
20
But I will remove the northern army far away from you, and will drive it into a barren and desolate land, its front into the eastern sea, and its back into the western sea; and its stench will come up, and its bad smell will rise." Surely he has done great things.
21
Land, don't be afraid. Be glad and rejoice, for Yahweh has done great things.
22
Don't be afraid, you animals of the field; for the pastures of the wilderness spring up, for the tree bears its fruit. The fig tree and the vine yield their strength.
23
"Be glad then, you children of Zion, and rejoice in Yahweh, your God; for he gives you the former rain in just measure, and he causes the rain to come down for you, the former rain and the latter rain, as before.
24
The threshing floors will be full of wheat, and the vats will overflow with new wine and oil.
25
I will restore to you the years that the swarming locust has eaten, the great locust, the grasshopper, and the caterpillar, my great army, which I sent among you.
26
You will have plenty to eat, and be satisfied, and will praise the name of Yahweh, your God, who has dealt wondrously with you; and my people will never again be disappointed.
27
You will know that I am in the midst of Israel, and that I am Yahweh, your God, and there is no one else; and my people will never again be disappointed.
