In my last blog I quoted extensively from Dr. Caroline Leaf’s recent book, Switch On Your Brain (Baker Books), from a chapter in which she talked about the myth of genetic determinism in our choices. In another section, she raised an interesting question about the intergenerational dysfunctions (or sin) in families.

There has always been a challenging scripture in Exodus that this may speak to. “You shall not bow down to them or worship them; for I, the Lord your God, am a jealous God, punishing the children for the sin of the fathers to the third and fourth generation of those who hate me, but showing love to a thousand generations of those who love me and keep my commandments” (Ex.20:5-6, emphasis added).

I have always puzzled somewhat about the meaning of “punishing the children to third and fourth generation” – especially when God says in another place, “The soul who sins is the one who will die. The son will not share the guilt of the father, nor will the father share the guilt of the son. The righteousness of the righteous man will be credited to him, and the wickedness of the wicked will be charged against him…The son will not share the guilt of the father, nor will the father share the guilt of the son” (Ezek.18:18-20). So…in light of this passage what does Exodus 20 mean?

I have always understood Exodus 20 to mean that the consequences of the Father’s sins will effect the children through four generations if they are not dealt with spiritually. For instance, unrepented sin by a father (especially idolatry) might give Satan a legal right to afflict a family and that right will continue through four generations unless it is dealt with by the children acknowledging and renouncing those sins and serving God. Also, we know that unrepented sins establish behavioral patterns in families that can be passed on from generation to generation.

In her recent book, Dr. Leaf says, “Science has demonstrated how the thought networks pass through the sperm and the ova via DNA to the next four generations” (p.57). That got my attention. She went on to describe the scientific explanation for that but essentially science is discovering that the thought patterns we choose to follow are written in our very DNA like a program on a computer chip. Those may be uploaded into the mind of the next four generations as genetic tendencies or predispositions that can be turned on and become operative if the mind of that generation comes into agreement with the predisposition. Leaf says, “the sins of the parents create a predisposition not a destiny” (p.59). Free will is always at play.

That agreement turns on the program and so the program may be duplicated, along with the consequences, generation after generation. That “genetic expression” can pass on, at a DNA level, both positive and negative results. However our mind (thought patterns that we choose) can turn on that genetic tendency or turn it off. We have power over the genes, not the genes over us. She sums it up this way, “Our choices (the epigenetic signals) alter the expression of genes (the epigenetic markers) which can then be passed on to our children and grandchildren, ready to predispose them before they are even conceived. So our bad choices become their predispositions.”

This reality does not negate the spiritual dimension but adds a dimension to it and gives us even more reason to make good choices – not just for us but also for generations to come. This presents an additional dimension of cursing ourselves and our children when we ignore the truths of God’s word about guarding our hearts, taking every thought captive to Christ, and being those who speak blessings rather than curses. The thought patterns we choose that are contrary to the word of God get written into our very DNA and effect us spiritually, emotionally and physically in very negative ways. Aligning our thoughts and words to God’s truth, however, writes blessings into our very DNA and can be passed on to generations. Think and speak the good things of God today.