And this is His commandment: that we should believe on the name of His Son Jesus Christ and love one another, as He gave us commandment.
1 John 3:23 (NKJV)
Under the new covenant God’s commandment to us can be summed up in this: that we should believe on the Lord Jesus, and as a result walk in love towards each other. Notice that the commandment to walk in love follows our having received Jesus. And so everything begins and ends with Jesus. He puts us into right standing with the Father, and as a result of our right standing our conscience is cleansed, our hearts are purified, and we are made free to walk in love.