The meaning of life: without life after death

Let us assume that life after death is a lie. When you die, all conciousness stops. What kind of life would you lead? If you knew your end of your means was nothing for eternity, what would your meaning of life be? The easy and naive answer is nothing. Not because it's ambitious but because it is too simple to describe what this type of thinker is thinking. To a spiritualist, death is not the end; but to a naturalist it is the pressing end that drives them. The naturalist has no need to think about the pressures of obtaining eternal life, because he cares about the endless possibilities of pleasures of the present. If there is any future involved in the mind of a naturalist, it is either benefit or destruction of people, things and situations. With all this in mind what are some things we can deduce from our experiment? That in this frame of mind, the point of life is to maximize the pleasures that a person experiences unto death. This principle alone has no moral boundries, but a society and individuals set their own limitations to what most people consider evil. A life lived this way allows a person to push his physical and mental limits to the point of death and the death and destruction of others. That is they have the option to destroy, or keep. If I believed this way, and I knew it was true, then I would promote goodwill to the human race. I would be fighting the forces that wish to destroy the livelyhood of people. I would promote civilization as a whole to better itself without killing itself first. That meaning of life itself would be quite difficult without the spiritual option.