I'd also like to address the English word "intoxication." So many posters in this thread have used it as an argument to condemn using cannabis.
First, the medical community uses the word 'intoxication' as a means of gauging the physical effect of a substance. It does not necessarily mean 'rip-roaring-drunk,' although it can mean that. It is a side-effect like 'nausea' or 'fever.' Modern usage of the word "intoxication" can be slight or heavy --- barely perceptible all the way to incapacitating. It is used with a quantifier to guage the
level of intoxication.
For example, you would find it used in a sentence like, "Nicotine is highly addictive like cocaine and heroin, but the level of intoxication is low."
"Do not get drunk with wine, which will ruin you; instead, be filled with the Spirit." Eph 5:18
The Greek word for 'drunk/intoxicated' in Ephesians 5:18 is "methuskesthe." What did that word mean to people of biblical times? We don't know. We can speculate, but the truth of it is: nobody knows for sure.
The only thing we can do is review secular historical documents and other texts in the Bible.
In the same passage of text (Eph. 5:18) it says "be
filled with the spirit." The word
filled is "plērousthe" in Greek. It is another form of intoxication, but obviously an acceptable level of intoxication because Paul recommends it.
With this contrast we can
assume that one form is excessive and the other is not.
Conclusions -- let's not be hasty to say all use of drugs/alcohol is excessive intoxication. We know that
severe intoxication is a sin. However, let's be sure to read all the passages in Ephesians to keep our doctrine straight. Paul is talking about plenty of other issues in the same light -- greed, harsh language, pride, and ignorance.
Let's keep an open mind and not subject ourselves to ignorance regarding drug use. Nothing worse than some church elder who is addicted to pain-killers, internet and coffee pointing fingers at the guy in the back who smokes cannabis.