All scripture comes from God, and we need to know the characteristics of God as we read his word. God is different from humans and a major difference is that time for God is different from times for us. God lives in eternal time, time for us happens in sequence. God uses that we understand time in a different way, but for God, everything either is or isn't so.Can you rephrase it?
In the case of Moses and Paul, it is always so that law is spiritual yet God used commands of the flesh for a time to help people understand the spiritual aspects of the law. That changed when Christ put the law in our hearts, and we say the law changed. But in God's eyes everything is eternal, not changed with time. God simply used our understanding of time to explain law in a different way.
We need to see the eternal of God in scripture as we read His word.