Wonders 7 -Cutting Edge

Why does the same word for teeth (shinayim ) , also carry 2 more meanings :
Two & to sharpen as in
Veshinantom - you shall teach them sharply ?
Rav Miller ztl explains that it is all related when we chew our food again & again we enjoy it more , it is healthier & our teeth maintain their sharpness.
So too , we need to always keep on reviewing our Torah studies so that we understand them with more clarity , sharpness & depth.
The word shinui ( change ) is also used because the food is changed as one continues to chew it. In learning as well , we become different in an elevated sense as we progress in our studies.
Now may be a good time for a gem of Torah study.
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