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.
Deuteronomy 9:26-29
26
I prayed to Yahweh, and said, "Lord Yahweh, don't destroy your people and your inheritance, that you have redeemed through your greatness, that you have brought forth out of Egypt with a mighty hand.
27
Remember your servants, Abraham, Isaac, and Jacob; don't look to the stubbornness of this people, nor to their wickedness, nor to their sin,
28
lest the land you brought us out from say, 'Because Yahweh was not able to bring them into the land which he promised to them, and because he hated them, he has brought them out to kill them in the wilderness.'
29
Yet they are your people and your inheritance, which you brought out by your great power and by your outstretched arm."
