The best religion around, as far as pure
spirituality is the Society of Friends (Quakers). The Quakers have no
religious organization and no creed. Friends gather on Sundays and
other times to be together quietly. Each rises to speak only when the
inner spirit moves him. The meetings also have 'announcements' at the
end like other churches.
Generally, since other Quakers get up to report that the spirit wants them to live simply and peacefully that is what virtually everyone ends up finding their inner spirit saying.
The historic problem the Quakers have had is that a modern commercial society doesn't have many people who's inner voice is telling them to live simply...unless the voice of 'buy a new flat screen 54 inch TV' is understood as advocating simple living.
The other problem is
that peaceful thing. The Quakers made a valiant effort before the
Civil War to talk to all their members in the Confederate South and urge the ones who owned
slaves to be examples and free their slaves. The Quakers made an
intense effort to stop the Civil War. They have tried to stop every
other war too. It gets discouraging when your religion has such a long
history of failure.
Maybe the Quakers, who have been around for nearly 4 centuries and only have a few hundred thousand members, are so old and small because the real inner voice doesn't feel free to speak honestly among a group of pacifist Quakers.
My inner voice encourages simple living and many other virtues for practical not spiritual reasons. But my inner voice has never recommended the pacifist response to aggression, meanness, cruelty or any other anti-human abomination.
The Quaker inner voice may just be a voice of pacifist social pressure.