What's the most positive thing that religion offer?

Well, I am a Scientologist. I have been now for 5 years. When I think of a religion, I think of it in the sense of a workable technology that leads to total freedom. That is what Scientology does. Not only can it create this path, but it answers the cause of existence and how we came to be where we are. We find truth and also find people with a common purpose to create a better civilization.

With Scientology, we take the steps to eradicate the use of legal and illegal substances that alter the mind and destroy the body.
We also have the most workable techniques on the planet with our study technology that is now being placed into hundreds of educational facilities of the world.
We also offer business technology that is involved in the biggest and most expansive businesses on the planet.
We also have the biggest group of ministers, the Volunteer Ministers, who help and show up at any major crisis, and offer both physical and spiritual help during such times of need.

We are also responsible for ridding the most dangerous mental technology on the planet aimed at completely destroying any life that a person may exhibit, Psychiatry.

We support Human Rights and have promoted the Universal Declaration of Human Rights across the planet. We do everything we can to better the civilization and we support religious freedom and are doing everything to make it possible that each and every individual has the right to his own beliefs.

It is in our Code of A Scientologist. So I believe the most positive thing is very hard to name in this case since, I believe religions have been the positive force in promoting betterment for the individual and group.