Sometimes when we practice dharma we think that we need to show some sort of external or physical sign of it. We pay a lot of attention to the rituals and these actions of our body and speech. This is practicing dharma when we're focusing outside. But instead what we need to do is turn our attention inwards. We need to see whether what we're doing is functioning as an antidote to the afflictions or not. We need to see whether we are taming our mind or not. We need to see whether our mind is improving, getting kinder, or not. If we don't look at it in this way then there's no benefit to doing these actions – we think that we are trying to do the dharma, but actually we are just making a show with our body and speech. We are putting on appearances, and that's all we really take an interest in. And the moment that happens, this becomes spiritual materialism. 

-- 17th Karmapa, Ogyen Trinley Dorje