Often it is hard. So hard, in fact, that Jesus' decree to love and pray for our opponents is regarded as one of the most breathtaking and gut-wrenching challenges of his entire Sermon on the Mount, a speech renowned for its outrageous claims. There was no record of any other spiritual leader ever having articulated such a clear-cut, unambiguous command for people to express compassion to those who are actively working against their best interests.
If Jesus sets the divine standard for morality, I could now have an unwavering foundation for my choices and decisions, rather than basing them on the ever-shifting sands of expediency and self-centeredness.
I went to a psychologist friend and said if 500 people claimed to see Jesus after he died, it was just a hallucination. He said hallucinations are an individual event. If 500 people have the same hallucination, that's a bigger miracle than the resurrection.
The real issue is whether the sources we do have are credible - and in the case of the New Testament, they certainly are! And keep in mind that Matthew, Mark, Luke, and John report what Jesus' contemporaries knew to be true about him.