“Whatever I command you, be careful to observe to do it; you shall not add to it nor take away from it.” God is very specific in His instructions to us so that we would worship Him in a way that is pleasing to Him. The world has other ideas about worshiping God, ways that are contrary to God’s instructions. Learn in this sermon how the doctrines in Hebrews actually outline and parallel the Holy Days that God commanded in the O.T., further explaining their meaning for us today.