The story of Nadab and Abihu highlights the importance of having a holy heart in service to God, as their carelessness in offering "strange fire" resulted in immediate judgment. While Aaron's failure to eat the sin offering was also a ritual violation, his heart's grief over the loss of his sons led to God's mercy, showing that God values the condition of the heart over ritual observance. Ultimately, Jesus, as the perfect High Priest, fulfills the law's requirements with a holy, pure heart, allowing believers to approach God's holiness with confidence and offering a model of true worship that transcends mere rituals.
