God and his word is said to be unchangeable. My understanding of this assertion is challenged by the following verses of the bible: Leviticus 11:1-end specifies the animals to be eaten by his people and the ones considered to the forbidden ones. It is stated that anyone who eats the forbidden animal would be unclean. The sanction for violation is also clearly stated there in. However,in Matthew 15:11,Jesus says -"it is not what goes into a person mouth that makes him ritually unclean,rather what comes out of it makes him unclean". Saint Paul in 1Corinthians8:8 says"Food,however will not improve your relationship with God,we shall not loose anything if we do not eat,nor shall we gain anything if we do eat" Obviously,there is a change in the way God considered eating food in the old and new testament.It can be assumed that while people in OT time would be very conscious and fearful of this law (indeed, some would have fallen foul and received appropriate punishment)we in NT time are completely left off the hook.Can we consider this a change for the better?

He finally stopped drinking.

Hmmn, hasn't your pastor told you to take it as it is and not to question God?
Avoid reading the scriptures with your brain, read with your heart lest you fall!