Actually, Jesus summed it up (and not the first time a person had), that the secret to a successful life is to love your neighbor as yourself. Quite a challenge to determine the boundaries on that to stay a healthy person. It can be different for each person and change as time goes by for each individual.
Of course, Jesus talked about the future and prophecy, so if you don't believe those, can you truly be walking the way Jesus walked. Jesus believed in a personal God, after all he said he had been in heaven with God. Can a person pick and choose from what Jesus taught and modeled for us and still be a Christian?
Almost every good saying of Jesus can be found in other cultures either before he was on earth, or from communities isolated from Christian contact. Just common sense. Just as Paul said, people doing what the Law said without any knowledge of it.
Blondie