The Essence

Do to others whatever you would like them to do to you. This is the essence of all that is taught in the law and the prophets.
Matthew 7:12 NLT

According to Oxford Languages, essence is defined as "the intrinsic nature or indispensable quality of something". The very thing that makes something what it is. So what is it that we're supposed to be doing to others?

Loving each other. 

This is my commandment: Love each other in the same way I have loved you. 

Always be humble and gentle. Be patient with each other, making allowance for each other’s faults because of your love. 

Make every effort to keep yourselves united in the Spirit, binding yourselves together with peace.
Helping each other. Share each other’s burdens, and in this way obey the law of Christ.

...be kind to each other, tenderhearted, forgiving one another, just as God through Christ has forgiven you. 

So encourage each other and build each other up...

This obviously is not a complete reference for doing unto others. However, I would encourage you to pick one and work on it for a week - see how it changes the essence of your life.

Prayer:

Father, 

          Thank You for sending Your Son to fulfill all the law and prophecies of the Old Testament. Thank You for His excellence. Thank You for placing such an incredible example before us and for writing the manual and leaving it with us to guide our way to You. Help us to walk in the Light of You and live the Truth known as the Golden Rule. In Jesus' Name we pray. Amen