Alcohol is especially not for Priests, for they are to be ever Holy [Holiness] unto the the Lord:
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: Leviticus 10:9
And that ye may put difference between holy and unholy, and between unclean and clean; Leviticus 10:10
[Some will say I have taken this passage out of context for it only deals with not drinking when entered into the Sanctuary, but
they do not know the basics of scripture [I do not merely say so, Paul himself says so; Hebrews 5:11-14], but rather if one will consider yet further the Book of Hebrews [where in Paul is quite clear], etc, it will be seen that I have placed it exactly within its proper context for Christians [1 Corinthians 10:6,11, 15:46; for those things were written for our admonition, for ensamples [types] unto us], who are,
even now supposed to be by faith, entered into the True Tabernacle of Heaven's work; Thus being that
we are entered in with Him [Christ Jesus]
by Faith, even now into the Most Holy in Heaven, the Anti-typical Day of Atonement; see Daniel; Hebrews and Revelation, Leviticus 16 and 23. More detail may be said of this later.]
...the example of Nadab and Abihu [Leviticus 10:1-11; Numbers 3:4; 26:1; 1 Chronicles 24:2] are given as examples of what happens in transgression by drinking that which is forbidden and bringing not the Holy Fire of God, but their own "strange" fire of confusion [God is not the author of confusion (which is what alcohol brings) – 1 Corinthians 14:33] before the LORD, therefore:
"... put difference between holy and unholy, and between unclean and clean;" [Leviticus 10:10]
Those which place no such difference, but instead put darkness for light and bitter for sweet, will so likewise perish in the presence of the LORD.
Jesus Christ upon the cross, was offered the wine (alcohol) mingles with myrrh, tasted it, see, Mark 15:23 (see also Matthew 27:34; Luke 23:36), and
he did not drink it.
Mat_27:34 They gave him vinegar to drink mingled with gall: and when he had tasted thereof, he would not drink.
For it was the symbol of death (decay, corruption):
Heb_2:9 But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.
As priests of the most High God, we are to be entered into the True Sanctuary with God by faith, and thus we are not to drink alcohol, as Nadab and Abihu, and offer a strange fire. There is not alcohol in Heaven, and none will be in the New Heaven and New Earth, for all thing there are eternally "new".