Ernest C. Reisinger emphasizes the inseparable relationship between God's law and love in his sermon 'The Law and Love.' He argues that true love for God is demonstrated through obedience to His commandments, as highlighted in John 14:15 and 21. Reisinger warns against the false dichotomy that separates law from love, asserting that love is not merely an emotion but is expressed through adherence to God's moral standards. He stresses that the essence of Christian conduct is rooted in both love and law, which are meant to complement each other rather than exist in opposition. The preacher calls for discernment in understanding this relationship to avoid the errors of antinomianism and sentimentalism.