Whether marijuana is healthy or not is the very point at dispute. That it changes the way you think would at least presumptively make us assume "no".
Why does the fact that it changes the way you think, make you lean towards no? Have you ever considered that, perhaps changing the way you think can be a positive
thing? For me, I love that it changes the way I think, but in a great way! My imagination has been stretched, and I am much more creative. Not to mention the fact that, I am much more relaxed and calm in situations.
I turn it around and ask why would it include smoking? Why would smoking be something natural that God designed plants for? Do you see any other animals smoking stuff? Did the Israelites in the time of Moses when Genesis was written smoke? Hermeneutics 101.
The fact that those chemicals in the plants react with our bodies to produce that oh so pleasant feeling means to me that God intended the plants for our use. And so what if the Israelites didn't smoke marijuana? Just because the Israelites or Jesus didn't do something, doesn't mean that they by default would have disapproved of it.
Would you claim that alcohol has no detrimental effects on families because angry drunk husbands who beat up their wives... oh well they probably had other issues?
No, but I wouldn't use that to justify total abstinence of it as a whole. Alcohol is an organic compound material God made and approved for our consumption. When used in moderation, it is great to loosen up and have a good time. When abused...Well, you know how that goes. I would say that almost every single one of those drunk, abusive husbands all had deeper emotional, financial, or marital problems that needed to be addressed before the alcohol. Deal with those issues, and the alcohol issue would usually be much easier to solve. Same with weed.
Yup, my wife did me physical violence under the influence of marijuana. She NEVER did any such thing when she was sober.
Oh... but its ok, because I guess she had "other issues".
Now, as much as I doubt it, it could be possible that your wife, could be in that small minority of people that for whatever reason, she reacts horribly to marijuana, in which case I would advise her to get off of it. But , I would refrain from using her in your perception of how marijuana as a whole feels for society as a whole. I have a challenge for you. Try it yourself! I'd be curious to hear your thoughts. I challenge you to smoke marijuana yourself 2-3 times (usually people mess up their first time) and report your experiences back here. I will be very surprised if you don't change your mind.
That you haven't yet experienced paranoia, doesn't mean it won't happen. It just means that lies ahead of you. I haven't experienced a road accident drunk driving yet, but it doesn't mean it won't happen if I continue a certain behavior.
Any paranoia I feel, is very minimal and overwhelmed in the sea of bliss I feel.
Which serious medical studies conclude that marijuana has no detrimental effects on your mind?
Here is a 15 year long study which found no link between cognitive decline and smoking marijauna:http://aje.oxfordjournals.org/content/149/9/794.full.pdf
Although there are definite short-term effects which are part of the "high", and maybe some after-effects of laziness, after a day or two, you feel back to 100%.