What a man sows follows the universal law of "kind reproduces kind." We cannot get cabbage from brussels sprout seeds, nor carrots from radish seeds—no matter how much the seeds may look alike. They are simply not of the same kind.
If we planted corn and got pumpkins, we would be greatly surprised. Similarly, if we gossip about our friends, we should not be surprised to find that we do not have as many friends as before or that people are more guarded in their relationships with us. The seeds of gossip can produce only one kind of fruit—bad! Every action produces results, and every result tends to be of the kind that was sowed.
Jesus confirms this principle in human conduct:
You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. (Matthew 7:16-18)
A second principle is at work on this earth among living things. In the reproductive process there is a powerful tendency toward increase. Simple observation of our lawns establishes this truth—weeds!
When we put these two principles together, we find that no matter what a man sows, unless something intervenes to interrupt the cycle, more will be produced than was sown. One can fake living according to Christian standards and morals for a while, but no matter how careful a person is, the fruit produced by his life will betray him. As Numbers 32:23 says, "But if you do not do [as God commands], then take note, you have sinned against the LORD; and be sure your sin will find you out."
No one knows how long it will take and how much fruit will be produced, but sin will produce spiritual weaknesses, even though they are concealed with great energy and hypocrisy. Bitterness, divisiveness, weak understanding, confusion, and spiritual lethargy will surface. Many variables affect how much and how soon the fruit will appear, but because of the principle of increase, it is certain that more will be reaped than was originally sown.