picture this: There is a hospital. In the hospital there are two beds next to each other. On the two beds there are two men. About the same age almost 70. Now they are going to die. And they are going to die because of the same reason: they're old. Now the one on the left is crying and screaming and the other one has never been so happy in his life.
The first thinks, "The good is gone, the bad is ahead". The second thinks the opposite. It's the paradigm difference. Ask a materialist: "Can you picture yourself being happy on your deathbed?"
Yep right answer. The one on the left is a non-devotee and is thinking: "oh no! My life is coming to an end. Now I can't enjoy anymore." The one on the right is a devotee and he is thinking: "Wow! Finally I can go to Krishna!" Cool ey?