I have thought about this many times. The WTS tries to show how the original language words meant something different (and we are not capable of understanding it seemingly since the WTS does not tell which word they are referring to.)
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Doesn’t the Bible say that God never changes?
Yes, the Bible records God as saying: “I am Jehovah; I do not change.” (Malachi 3:6) Similarly, the Bible says that God “does not vary or change like the shifting shadows.” (James 1:17) This, however, does not contradict what the Bible says about God changing his mind. God is unchangeable in that his personality and standards of love and justice never alter. (Deuteronomy 32:4; 1 John 4:8) Still, he can give different instructions to people at different times. For instance, God gave opposite instructions to King David for fighting two consecutive battles, yet both methods succeeded.—2 Samuel 5:18-25. (Found at ijwbq article 86 in the WT Online Library, no link not to make someone uncomfortable going directly to the site, remember just reporting, not supporting)