This is the gist of all worship — to be pure and to do good to others. He who sees Shiva in the poor, in the weak, and in the diseased, really worships Shiva; and if he sees Shiva only in the image, his worship is but preliminary.
The prayees of those that are pure in mind and body will be answered by Shiva, and those that are impure and yet try to teach religion to others will fail in the end.