Why is it impossible to fulfill the Law according to the sermon?

The sermon emphasizes that fulfilling the Law is beyond human capability due to our sinful nature. Romans 3:20 states, 'therefore by the deeds of the law there shall no flesh be justified in his sight,' which means that all attempts at righteousness are tainted by sin. The Law serves to reveal our need for a Savior by highlighting our inability to meet its demands. As demonstrated through the actions of the priest and Levite, reliance on the Law offers no mercy or help for the spiritually wounded; rather, it exposes our failures. Thus, the essence of the Law ultimately leads us to Christ, our only hope for justification and mercy.