Is smoking weed wrong?

My Notes on this Talk:

Ben Witherington
In John 2:1-12, Jesus provides the wine for a wedding. It is clear from the toastmaster's comment ("you've saved the best wine for last") that we are dealing with an alcoholic beverage. The normal procedure in a feast would be to provide the best and most potent wine first, and then the more watered down and less flavorful later as the palate became less discriminating.
There is, however, no endorsement in the Bible to use drugs that have the potential to seriously damage the mind or body. This is why church leaders are to be those not given to too much wine (1 Timothy 3:3,8--not a drunkard, not given to too much wine). There is then condemnation of overindulgence, but not of drinking in moderation.
There is not however any encouragement or endorsement of using drugs which do not constitute food or beverage in any age of human history. In fact, there may well be a prohibition of a particular kind of drug, one which produces abortions: In Galatians 5:20, there is a reference to pharmakeia (from which we get the word pharmacy). This term may, however, refer to the use of drugs in pagan worship ceremonie
Drug Abuse

While tobacco and recreational drugs are not mentioned in the Scriptures, principles governing the use of such substances are clearly stated in the Bible. Paul writes, "your body is the temple of the Holy Spirit" (1 Corinthians 6:19) and that "if anyone defiles the temple of God [the body], God will destroy him" (1 Corinthians 3:17). The Bible plainly states that we are not to damage our bodies—which drug abuse (whether the drug is legal or not) plainly does. These biblical principles are preventive in nature, and anyone with common sense can see this. To give into cravings for alcohol, tobacco or drugs is a form of idolatry and lust—violating several of the Ten Commandments. Biblical health principles are not intended to limit human pleasure, but are designed to ensure that those pleasures will be positive and enjoyable experiences.
Salvation
Philippians 2:12
What I'm getting at, friends, is that you should simply keep on doing what you've done from the beginning. When I was living among you, you lived in responsive obedience. Now that I'm separated from you, keep it up. Better yet, redouble your efforts. Be energetic in your life of salvation, reverent and sensitive before God. That energy is God's energy, an energy deep within you, God himself willing and working at what will give him the most pleasure.
12So then, my beloved, just as you have always obeyed, not as in my presence only, but now much more in my absence, work out your salvation with fear and trembling;
13for it is God who is at work in you, both to will and to work for His good pleasure.

Drunkenness
Ephesians 5:18
18-20Don't drink too much wine. That cheapens your life. Drink the Spirit of God, huge draughts of him. Sing hymns instead of drinking songs! Sing songs from your heart to Christ. Sing praises over everything, any excuse for a song to God the Father in the name of our Master, Jesus Christ.
1 Corinthians 5:11
9-13I wrote you in my earlier letter that you shouldn't make yourselves at home among the sexually promiscuous. I didn't mean that you should have nothing at all to do with outsiders of that sort. Or with crooks, whether blue or white-collar. Or with spiritual phonies, for that matter. You'd have to leave the world entirely to do that! But I am saying that you shouldn't act as if everything is just fine when a friend who claims to be a Christian is promiscuous or crooked, is flip with God or rude to friends, gets drunk or becomes greedy and predatory. You can't just go along with this, treating it as acceptable behavior. I'm not responsible for what the outsiders do, but don't we have some responsibility for those within our community of believers? God decides on the outsiders, but we need to decide when our brothers and sisters are out of line and, if necessary, clean house.
1 Thessalonians 5:6-8
4-8But friends, you're not in the dark, so how could you be taken off guard by any of this? You're sons of Light, daughters of Day. We live under wide open skies and know where we stand. So let's not sleepwalk through life like those others. Let's keep our eyes open and be smart. People sleep at night and get drunk at night. But not us! Since we're creatures of Day, let's act like it. Walk out into the daylight sober, dressed up in faith, love, and the hope of salvation.
Galatians 5:19-21
19-21It is obvious what kind of life develops out of trying to get your own way all the time: repetitive, loveless, cheap sex; a stinking accumulation of mental and emotional garbage; frenzied and joyless grabs for happiness; trinket gods; magic-show religion; paranoid loneliness; cutthroat competition; all-consuming-yet-never-satisfied wants; a brutal temper; an impotence to love or be loved; divided homes and divided lives; small-minded and lopsided pursuits; the vicious habit of depersonalizing everyone into a rival; uncontrolled and uncontrollable addictions; ugly parodies of community. I could go on.
This isn't the first time I have warned you, you know. If you use your freedom this way, you will not inherit God's kingdom.
Sober mind
1 Peter 1:13
So roll up your sleeves, put your mind in gear, be totally ready to receive the gift that's coming when Jesus arrives. Don't lazily slip back into those old grooves of evil, doing just what you feel like doing. You didn't know any better then; you do now. As obedient children, let yourselves be pulled into a way of life shaped by God's life, a life energetic and blazing with holiness. God said, "I am holy; you be holy."
Romans 12:2
1-2 So here's what I want you to do, God helping you: Take your everyday, ordinary life—your sleeping, eating, going-to-work, and walking-around life—and place it before God as an offering. Embracing what God does for you is the best thing you can do for him. Don't become so well-adjusted to your culture that you fit into it without even thinking. Instead, fix your attention on God. You'll be changed from the inside out. Readily recognize what he wants from you, and quickly respond to it. Unlike the culture around you, always dragging you down to its level of immaturity, God brings the best out of you, develops well-formed maturity in you.
2 Corinthians 10:5
3-6The world is unprincipled. It's dog-eat-dog out there! The world doesn't fight fair. But we don't live or fight our battles that way—never have and never will. The tools of our trade aren't for marketing or manipulatjavascript:void(0)ion, but they are for demolishing that entire massively corrupt culture. We use our powerful God-tools for smashing warped philosophies, tearing down barriers erected against the truth of God, fitting every loose thought and emotion and impulse into the structure of life shaped by Christ. Our tools are ready at hand for clearing the ground of every obstruction and building lives of obedience into maturity.
Philippians 4:8
8-9Summing it all up, friends, I'd say you'll do best by filling your minds and meditating on things true, noble, reputable, authentic, compelling, gracious—the best, not the worst; the beautiful, not the ugly; things to praise, not things to curse. Put into practice what you learned from me, what you heard and saw and realized. Do that, and God, who makes everything work together, will work you into his most excellent harmonies.