Leviticus 10[AMP]: [v1] AND NADAB and Abihu, the sons of Aaron, each took his censer and put fire in it, and put incense on it, and offered strange and unholy fire before the Lord, as He had not commanded them. [v2] And there came forth fire from before the Lord and killed them, and they died before the Lord. [v3] Then Moses said to Aaron, This is what the Lord meant when He said, I [a][and My will, not their own] will be acknowledged as hallowed by those who come near Me, and before all the people I will be honored. And Aaron said nothing.
Nadab and Abihu were sons of Aaron, the Chief Priest (They certainly were well-connected!). They were involved in priestly duties (They were doing things for the Lord). This should have gone well, and not ended in their deaths, if God were one to consider that "the end justifies the means". Our God, however, is sovereign and His will shall be acknowledged and hallowed (i.e., observed, followed, duly-regarded) in all things, especially by those who come near Him (i.e., who draw near Him). Through this, He will be honored before all people.
Just like Aaron's sons, Nadab and Abihu, we tend to do things our way instead of doing what God commanded us, even in things that we intend to offer for Him. This includes matters such as sharing the Gospel, ministering to another, performing our God-given responsibilities. Are we in step with the Holy Spirit, as we live out an abiding life in Christ? Or do we still do things for the Lord our way?
Just as fire came forth from the Lord and killed Nadab and Abihu in Leviticus 10:2, our Lord Jesus' eyes are ablaze today, seeing through our hearts and our ways.
Our Messiah's eyes are, after all, described as "like a flame of fire" Revelations 19:12[AMP].
We are to honor and revere God, in His sovereignty and omniscience. This necessarily includes obeying and following His will in all things, all the time, all the way.
Finally, when a Moses in our lives points out whatever it is that the Lord may be teaching us, unlike Aaron, we should have teachable spirits. Unlike Aaron who merely said nothing, probably the rightful response would be, "Lord, forgive me, for I have not done things your way, and I have failed to teach my children (i.e., others) to obey You in all ways." After a lapse, I believe God would have wanted a repentant heart and a teachable spirit from Abraham, instead of nothingness to the point of being unmoved.
Dear Lord Jesus, may Your eyes see through my entire being. Cleanse and purge me with Your fire. Teach me my erring ways, oh Lord, that I may turn back on them and draw nearer (even running!) towards You, my God. Please forgive me for the times when I did things my way, without waiting for Your leading and instructions. I desire to honor You, Lord. Please guide me and empower me to obey You, for Your name's sake. In Jesus' name, amen.