Arrogance

Just because you have spiritual convictions that work well for you, does not mean that you have all the truth.  That is an assumption and an arrogant one at that.  Such people tend to demand that everyone agree with them, their "right" spirituality, when in fact they simply have a Brand" of spirituality.  We seem to accept brand in almost everything, but matters of spiritual truth.  We don't mind that people buy cars that are different from our car.  We have little problem with matters in the consumer world of brands.  But woe when it comes to belief.  When we bought that car, we bought what "fits" us.  So why not simply say that your spiritual path fits you.  When people ask, you can tell them why it is a good fit for you.  That is all the "selling" you need to do.  False pride goeth before the fall.