The Bible calls the result of a person’s life “fruit.” It is what is produced from the life of a person, like apples are produced form the life of an apple tree. If the heart is bad, it will produce bad fruit. If the heart is good, it will produce good fruit.
Water, nutrients and oxygen pass through the tree. As they pass, they absorb from the life of tree; and the life of the tree passes into the fruit. If the life that the fruit receives is bad, the fruit will be bad. If the life that the fruit receives is good, the fruit will be good.
Fruit can never be good if it grows out of a heart that is bad.