Question 1: Who wrote that the purpose of the law was to give knowledge so sin and establish guilt? Paul in Galatians 3:19.
Question 2: Which two commands did Jesus declare to be the greatest and the substance of all God requires? Love your God with all your your heart and with all your soul and with all your mind, and to love your neighbor as yourself in Matthew 22:35-40, Mark 12:28-34.
Question 3: What did Paul teach is fuilfilling of the law? Love does no harm to its neighbor. Therefore love is fulfillment of the law in Romans 13:10.
Question 4: Who said the law was our schoolmaster to bring us unto Christ? Paul in Galatians 3:24.