“Never put into your body that which is harmful, which you know is harmful. Anything that causes the lack of oxygen flow to your brain causes the cells to perish in great numbers and they will never be again, for the brain lacks the ability to reproduce its cells. When your brain cells are destroyed, then you lessen your ability to transfer thought into a realized emotion in your body. Though you can contemplate the thought, it is a no-thing to you. That is when joy ceases, for how can you be joyous over a thought unless you can become it through the feeling of it?
When you are unable to feel, you are unable to register knowingness on this plane. That is the harm you do to your brain when you partake of what you term your weed or drugs that cause illusions to occur. Each time you partake of these things, they remove oxygen from your brain. It is the dying of your brain that causes what you term the high that you feel. That is why it occurs. Each time you do this, you restrict your ability to know. And there will come a time when you cannot weep or laugh, for there is no longer anything strong enough to create emotion within your being."
Ramtha - The White Book