It's sort of a two sided coin. On the one hand our awareness is so bottle-necked in our sober state of mind that it's very difficult to see things as they are without psychedelics. On the other hand one takes their mind a LOT more seriously. Everything is intensified, including one's emotions and imagination. Because of these stronger emotional ties, one's thoughts can cause turmoil and worry to no end if they take them too seriously. When you're exploring experience beyond the consistent world, exploring farther out does not mean you're getting closer to God, it just means your spiraling into even more remote locales of the imagination. Truth is felt through the realization of truth and sober works just fine for that, but it's like trying to win the superbowl without steroids.