How do we know the importance of obeying God's commands?

The book of Leviticus illustrates the importance of obeying God's commands through two critical events that result in death due to disobedience. Both Nadab and Abihu, despite their prestigious roles, failed to worship God according to His specifications, demonstrating that divine worship must align with God's holiness, and their demise illustrates the grave consequences of taking God's commands lightly. This narrative positions God's commandments as foundational for a relationship with Him, emphasizing that disregard for His law leads to tragic results. The text serves as a powerful reminder of the call to obedience that defines true worship and reverence for God.