How do we know God's instructions must be followed?

In 2 Samuel 6, when Uzzah touched the Ark to steady it, God struck him dead due to his error, highlighting that God's commands must be obeyed precisely. The incident illustrates that attempting to enhance or alter God's directives is presumptuous and unacceptable. Proper worship and reverence towards God and His commands are imperative, as they reflect His holiness and authority. Just as Uzzah's actions demonstrated a lack of respect for God's specific instructions, it is crucial for believers today to adhere strictly to God's Word in every aspect of life and worship.