This is a very easy answer but Im sure there is a much deeper layer to it... Because Jesus is the Living Water meaning if were baptised with the Holy Spirit, we can hear or even be married to a DEADLY WATER type of person and STILL NOT BEING INFLUENCED BY THEIR BEHAVIOUR!!! The deadly snakes are the deadly attacks of demons. Hope you get a better answer, this is just a thought. What do you think? Love in JESUS our LIVING WATER.... Leigh