I think part of it is like how people use a candle to meditate. It's a point of focus. Another is like teaching children about sex. First, trying to explain to a 3 year old why people have sex, both for procreation and pleasure, is an exercise in futility because there are concepts there far beyond their level of understanding. They can understand a bit about the concept of love since they like being loved themselves. So calling it "adult love" is about as much as they can handle. It's obviously more than that, but it's all they can handle. Human spirituality is similar. Some people, regardless of age, can't get it. It's like teaching calculus to someone with an IQ of 70. Not going to happen. So breaking it down and teaching them what they can understand, such as balancing a checkbook, is about all they can handle. In terms of spirituality, the concept of a power encompassing the Universe and threading itself through everything is difficult for them to grasp, so it's described as a Sky Daddy in a white robe with a long white beard is the most they can handle. Those who have a deeper sense of spirituality, can handle higher level concepts.