Human beings, in a sense, may be thought of as multidimensional creatures composed of such poetic considerations as the individual need for self-realization, subdued passions for overwhelming beauty, and a hunger for meaning beyond the flavors that enter and exit the physical body.
From personal experience, I know for sure that the number one thing that saddens the dead more than our grief — is not being conscious of their existence around us. They do want you to talk to them as if they were still in a physical body. They do want you to play their favorite music, keep their pictures out, and continue living as if they never went away. However, time and "corruption" have blurred the lines between the living and the dead, between man and Nature, and between the physical and the etheric. There was a time when man could communicate with animals, plants, the ether, and the dead. To do so requires one to access higher levels of consciousness, and this knowledge has been hidden from us. Why? Because then the plants would tell us how to cure ourselves. The animals would show us their feelings, and the dead would tell us that good acts do matter. In all, we would come to know that we are all one. And most importantly, we would be alerted of threats and opportunities, good and evil, truth vs. fiction. We would have eyes working for humanity from every angle, and this threatens "the corrupt". Secret societies exist to hide these truths, and to make sure lies are preserved from generation to generation.
Life probably does not hand us any more visceral experience of how we mistakenly define ourselves than by means of our physical body. From the day we were born, the message we received from the world was that we are our body. This was the first great lie we were given by means of the collective consciousness of humankind, which has always valued itself from the outside in.