There's already plenty of pain to go around. Making others feel bad does not make you feel better. Rather, making others feel better usually makes you feel better, too.
The Girl Scouts and Emily Post had it right. Civilization runs more smoothly and efficiently when we all mind our manners. (See "Mind your own beeswax", above.)
Too often groups create policy or action that withholds the rights of others based upon personal or religious preferences. Individuals should be free to live based upon individual or group ethics, but prohibited from that expression when it deny's another their own rights.
Establishing criteria to measure the effect of a decision on the least fortunate should be the rational basis of all group decisions. Ensuring that society benefits all, and not the affluent minority is the ethical thing to do.
The belief in a material afterlife is beyond outdated. The concept of eternal pleasure as reward or eternal torture as punishment needs to replaced by the understanding of heaven or hell as the last thought a person having when they die either being satisfaction or regret.
As human beings we thrive on a state of worthiness. To acknowledge that state of worthiness in others is the height of respect. As social beings we need to be acknowledged.
Regardless of the perceived benevolence of your belief system, never become so mired in it that you become locked into one set of ideals. Eclecticism is a beautiful thing. Don't give in to the seductive complacency of slapping a label on yourself and calling it a day.
In time you grow as a person to hopefully have a better understanding of what you do not know. When you are young you think you know everything and as you grow older you realize how little you do know and hopefully gain a better understanding of life itself.
there is simply no evidence to suggest such a life and how it would function. and the idea of living on forever and ever simply represents the human desire to remain alive in some way.
I defer to Carl Sagan: "Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves."