Is it a sin to smoke weed?
No passage mentions it, so the answer is built from principles
In short
No text in the Bible addresses cannabis. Anyone who tells you otherwise is stretching a verse. The answer has to be built from principles the Bible does state - sobriety, stewardship of the body, obeying civil law, and the difference between medical use and getting high - which is why sincere Christians land in different places.
What the text says
What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?
1 Corinthians 10:23 was the verse of the day on August 13, 2020. See that day
Often brought in1 Thessalonians 5:6
Therefore let us not sleep, as do others; but let us watch and be sober.
The New Testament repeatedly asks for a clear head. Whether that rules out intoxication in every form, or only being ruled by it, is exactly where the disagreement sits.
The counterweight1 Corinthians 10:23
All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not.
Paul's formula for disputed things: lawful is not the same as good for you. He refuses to turn a liberty into a rule in either direction.
What Christians agree on
Being controlled by a substance is treated as a problem throughout the New Testament. So is breaking the law of the place you live without cause. Nobody argues that habitual intoxication is compatible with the life the New Testament describes.
Where they disagree
Traditions that read sobriety strictly
Deliberately clouding your judgement is the thing Scripture warns about, whatever produces it. That the substance is legal where you live changes nothing.
Those who distinguish use from intoxication
The warnings target being mastered, not every dose. Medical use, or a small amount that leaves you in command of yourself, is not what the texts have in view.
Those who make legality decisive
Where it is illegal, the question is settled by the command to obey civil authority. Where it is legal, it returns to conscience and wisdom.
Questions worth asking
- Am I using this to face something, or to avoid it?
- Could I stop for a month without rearranging my life around the gap?
- Is this legal where I live, and if not, what am I telling myself about that?
- Would I be comfortable if the people who rely on me knew how often?
A page that pretended the Bible ruled on this would be easier to write and worth less to read. What Scripture gives you here is a set of questions about mastery and self-possession, and those turn out to be the questions that matter anyway.