According to Osho, 'too much Zen' is a misunderstanding: Zen is simply the end of words and second-hand knowledge. Language falsifies reality; silence reveals it. When concepts stop, innocence and direct intelligence flower - the mystic's, childlike knowing. What's excessive is thinking and intellectualism; Zen only removes that surplus, allowing you to rest in what is - God, truth, nirvana - without analysis, categories, or borrowed ideas.
Zen means dropping words and borrowed ideas so your quiet, childlike heart can know truth directly.