Some of Zoroaster's main tenets seem to be: Right mind, right speech, right
speechdeeds. That our world was a creation of Ormazd/Ahura Mazda and it was the followers obligation to go forth into the world, be productive and create abundance. Incorporated into this was that one had to exercise moderation and reason, and not the extremes of asceticism nor excess, and for one to be charitable with one's bounty with those most deserving. There was even a part in Dawn which described enjoyment and pleasure, within this frame of moderation using reason, as a totally natural, even reverent, experience, if we consider that it relates back to god.
Here are some related quotes from Dawn and Twilight of Zoroastrianism: