Our parsha begins with a very important subject for ourselves as individuals and as a community
"Justice, justice shall you pursue"
צֶ֥דֶק צֶ֖דֶק תִּרְדֹּ֑ף…
In order that
that you may live and possess the land the Lord, your God, is giving you
לְמַ֤עַן תִּֽחְיֶה֙ וְיָֽרַשְׁתָּ֣ אֶת הָאָ֔רֶץ אֲשֶׁר ה֥' אֱלֹהֶ֖יךָ נֹתֵ֥ן לָֽךְ.
We all know the difference between the written and oral Torah – The written Torah has many laws, but without "fences" and without full details of what is allowed or forbidden. The Oral Torah fills in the gaps – giving us preventive "fences" around the mitzvoth, and giving us full details of what we may or not do. The written Torah gives us a law, the oral Torah puts up a fence around it to protect us