We live in an era of “define-your-own” morality. If something is “wrong”, but you want to do it, then just redefine it as “right”, and away you go. The problem is that actions have consequences, and people who engage in selfish behaviour that feels “right” to them usually leave behind a trail of destruction in other people’s lives. Peter had this to say about it in the third chapter of his second letter:
Dear friends, this is the second letter that I have written to you, to provoke you to think seriously by reminding you to think about the messages spoken by the holy prophets in times past, and the instructions of our Lord and Saviour communicated through the apostles. Most importantly, understand that in the last days cynics will come, doing whatever pleases themselves, and saying, “Where is the second coming that he promised? Since the time when our ancestors died, everything has continued as it has from the beginning of creation.” They deliberately ignore the fact that the heavens were created long ago by the voice of God, and the earth was made from the water and surrounded by water.
In one sense the cynics may be right. If there really is no God, then individuals might as well do whatever pleases themselves without concern as to the consequences, because small meaningless pleasures are all that life has to offer. On the other hand, if what Jesus said was true, then the cynics are wasting their lives pursuing things of no value, whereas those who follow Jesus are pursuing an eternal relationship with God, the only thing that has real and lasting value.