This was on a counter missionary website, and I think the person who I am quoting is absolutely right. It definitely helps to keep this in mind during this time of year – when we are trying to improve and get closer to Hashem:
…some have been tempted to create their own forms of worship. However, doing so does not bring one actually closer to God; it only placates the religious emotion.
…What they do not realize is that God needs nothing, and there is nothing they can do for Him. They can only do what He has required.
Such people are like a husband who knows that his wife would appreciate him not leaving wet towels on the floor, taking off muddy boots before he comes in, and the like, but he does not do these small things that would show consideration of her feelings. He is always looking for some big gesture that will make him feel pleased with himself for his grandiosity. It is not her feelings with which he is concerned; it is his own.