Matthew 18:18 Jesus supposedly says:
I tell you the truth, whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.
So whatever behaviors are deemed obligatory on earth will also be obligatory in heaven and whatever behaviors are optional on earth will be optional in heaven.
This passage makes it sound as if heaven is just a continuation of the current life as far as rules of behavior go.
"Peshat is what I say and derash is what you say." --Nehama Leibowitz