That's circular. You're arguing that it is sinful because it induces a state of mind in which a person cannot give glory to god because it is sinful. See the problem?
Yes, but why can we not give glory to God through Christ after using cannabis? This is my question.
You're like impossible to talk to.
Using drugs as a medium to reach God is sinful--period. If a terminally ill cancer patient is using their medical mj to seek God and information through the supernatural they step over into serious sin. It's divination. The only way to seek God is through Jesus Christ, not marijuana. Drugs expose you to the supernatural realm. It's a dangerous place to play, having the "veil" lifted from your mind. People have been taking drugs to play in the supernatural for centuries. The Native Americans still do it, in fact.
It perplexes me that, you, having never smoked are trying to justify/rationalize just why weed is okay. Young Christians who are trying to decide whether marijuana is okay or not will google the subject and I pray to God they don't fall to your 'sterile' logic of justification for this sin.