Leviticus 10:9 Do not drink wine nor strong drink, thou, nor thy sons with thee, when ye go into the tabernacle of the congregation, lest ye die: it shall be a statute for ever throughout your generations: 10 And that ye may put difference between holy and unholy, and between unclean and clean
[Patriarchs & Prophets pp 360] Great blessings or privileges should never lull to security or carelessness. They should never give license to sin or cause the recipients to feel that God will not be exact with them. All the advantages which God has given are His means to throw ardor into the spirit, zeal into effort, and vigor into the carrying out of His holy will. Nadab and Abihu had not in their youth been trained to habits of self-control. The father's yielding disposition, his lack of firmness for right, had led him to neglect the discipline of his children. His sons had been permitted to follow inclination. Habits of self-indulgence, long cherished, obtained a hold upon them which even the responsibility of the most sacred office had not power to break.
They had not been taught to respect the authority of their father, and they did not realize the necessity of exact obedience to the requirements of God. Aaron's mistaken indulgence of his sons prepared them to become the subjects of the divine judgments. God designed to teach the people that they must approach Him with reverence and awe, and in His own appointed manner. He cannot accept partial obedience. It was not enough that in this solemn season of worship nearly everything was done as He had directed. God has pronounced a curse upon those who depart from His commandments, and put no difference between common and holy things.
He declares by the prophet: “Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness! ... woe unto them that are wise in their own eyes, and prudent in their own sight! ... which justify the wicked for reward, and take away the righteousness of the righteous from him! ... They have cast away the law of the Lord of hosts, and despised the word of the Holy One of Israel.” Isaiah 5:20-24.
Isaiah 5:20 Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter! 21 Woe unto them that are wise in their own eyes, and prudent in their own sight!
May The Lord add His blessing to the study of His word. God bless!