Obedience is one of THREE supernatural imperatives from God.
In order:
- to know God
- to love God
- to serve God
In the OT there were very few who knew God face to face. Moses was one.
The fallen moral state of humanity prevented virtually all humanity from having an intimate knowledge of God himself.
Without that knowledge, it was impossible to properly carry out the other two imperatives. Moses mediated the knowledge of God to the people through the Law. By that mediation, the people could come to know, love and serve God by following his laws. By “walking in his ways” the people would come to know him better and thus love and serve him, i.e., be in harmony with the creative power of God.
You have to realize that we have a very twisted understanding of what “serve” means vis a vis God.
Creation is spoken into existence by the word of God (And God said…). When we act according to “every word that comes from the mouth of God” that means we allow ourselves to be created by the omnipotent power of God, by being formed in his image, rather than forming ourselves by some illusion we concoct. To be obedient essentially means to be created or formed by God.
So we come to know God, love him and trust him; (the first two imperatives build trust) and only when the bond of trust is sufficient can we truly “serve” him in the sense of allow ourselves to be properly created by him.
In the OT, being influenced by the pagan cultures around them meant that the Israelites allowed those cultures to form them in the image of a corrupt idol rather than in the image of the authentic ground of all existence, God himself.
Obedience doesn’t fly in the face of the three other principles precisely because the pagan cultures around the Israelites were the greatest danger to them. They were a deadly influence. Those cultures would take away from the Israelites the very possibility of finding their identity in God, finding who they truly were as a people and as individuals.
This is why the “killing of babies” was very symbolic. It represented the extent of the power these pagan cultures could exercise over the Israelites. The babies represented the nascent form of evil, the power these cultures had to create evil, the power of generating or initiating the evil form humanity would take, in opposition to the form God was raising up in the “children of Israel.”
What did these cultures do with their babies? Burned them alive in sacrifice to Moloch, which is where the Israelites would end up if they allowed their identity to be formed, as a “baby” nation in the image of the demon god of the Canaanites.
Complete renunciation and defeat of every evil tendency was called for, including “cutting down” the seemingly harmless evil represented by the “baby” Canaanites. The Israelites were required to be ruthless where evil is concerned, because any toleration of it would allow it to take root, grow and overpower the divine life taking root in the people of Israel.
With the Incarnation, God has come to make himself known to every human being. We can have intimate knowledge of God through Christ. His death and resurrection has conquered the power of evil. Our knowledge, love and service of God are accomplished through the exercise of three supernatural virtues - faith, hope and charity - by the power of grace operating in us.
The evil that resided in the fallen nature of the pagan cultures in the OT, the evil that had to be rooted out like a cancer from the body of humanity in order to insure its survival, has finally been dealt with and removed by Christ, who was himself sacrificed to enter into the depths and death of humanity and finally deal with the power of evil.
God has rooted out evil from the depth of every human heart. If we cooperate with his creative power at the depths of being we become our true selves in the God who is. The power over evil now lives within each of us, but the responsibility to effectively use that power is ours.
Instead of being concerned to subdue the potential influences of external evil forces, we only need to tap into the infinite power of grace within. It is no longer an external battle for the hearts and minds of humanity, it is an internal one being fought inside of each of us. Still a battle, though. Only the field has changed.
Someone asked the question of what I would do if God ordered the killing of another person. That question implies a lack of knowledge of the history of humanity, a misunderstanding of the plan of salvation, no sense of where the field of battle is today two thousand years after the coming of Jesus and, most of all, separation from who God is. Jesus’ incarnation, death and resurrection has changed everything. Including the nature of the battle. For one thing, wouldn’t happen today because the battle plan is clear. It simply isn’t how God is working today, given what Jesus accomplished.
To complete the analogy, the human body is systemically and sufficiently healthy because God himself lives in mankind, so the “immune system” deals with cancerous cells internally.
On the other hand, I wouldn’t want to be a cancer cell in the body these days, either.
Unfortunately, the body seems to be inflicted with another cancer and the body is killing off its own cells (leukemia perhaps?) The white cells (political bodies) that are supposed to be protecting the body are actually overpowering new cells and destroying them. (Think about it :sad_yes

It is a difficult time, to be sure, but God lives in the body and is more powerful than any disease, even of the cancerous types where the body destroys its own cells.