You may try to drink wine in a controlled way, but wine is actually habit forming, and someday, if you want wine and cannot find any, you will feel annoyed.
To have a productive dialogue, we should apply the same amount of scrutiny and flexibility to all religions and beliefs. It's hard to do in practice, but this slogan can be a guide. Do not perform more mental gymnastics than you would allow another person to perform.
Morality is the rules of the society around you, and it can change as you move from one culture to another. Ethics is a set of internal rules, and it follows you around everywhere. Your ethics define who you are, in bad times as well as in good.
Because the universe is constantly evolving, "knowledge" learned by rote long ago may now be obsolete (if it was ever true in the first place). Constantly exploring old truths is the only way to make sure they're still valid.