Christian Private Ethics According To 1 Corinthians 15:33 And Its Implications For Christian Youth In Indonesia Oloria Malau Institut Agama Kristen Negeri Tarutung (Cristian State Intitute Of Tarutung) {oloriamalau.dra@gmail.com} Abstract. Adolescence is an important period in life because it is at this time that humans bridge childhood and adulthood. In addition, adolescence is an important period because this period is also a period: testing, development and expansion. Christian teenagers are now freer than teenagers from previous periods of time. Ethical values among teenagers now seem to have been degraded. Paul in 1 Corinthians 15:33 provides a clear picture for Christian youth in Indonesia not to be deceived and lost because of bad association. Which certainly will have a negative impact and the worst is to lead to destruction. The condition of adolescents who are still unstable causes them to be easily tempted and deceived. Therefore, the ethics of association are very necessary to fortify them from destruction. Where bad association begins because of wrong perceptions that lead them to poor communication and association. Therefore, Christian adolescents in Indonesia still need to need supervision and mentoring to be able to go through their transition to a true maturity both physically and spiritually. And that responsibility is certainly given to families, churches and also PAK teachers in schools. Keywords: ethics, association, youth, 1 Corinthians 15:33 1 Introduction Adolescence is a transition period when children grow up to be adults. That period is also considered to be the most beautiful period. But sometimes adolescence can also be vulnerable if teenagers make the wrong way both in relationships and relationships. Seeing today's teenage relationships, sometimes making the heart feel sad. Karma and ethics, almost no longer known by teenagers. Who is to blame in this case, parents, school, or the environment? How teenagers behave to parents, to teachers, and to fellow friends. It should be a shared concern. Ethical values among teenagers now seem to have been degraded. Problems arise when parents and teachers cannot find ways to convey messages and ethical and moral values to adolescents. Even more worrying, many parents and teachers actually lack ethics. So what about the association of Christian adolescents today, is there a difference that is seen compared to the association of adolescents in general. Christian teenagers are now freer than teenagers from previous periods of time. This can be seen by the proliferation of teenagers who watch midnight cinema or hangout at the cafe until late at night. This triggers free promiscuity which is being broadcast everywhere. Their association is not only limited to friends but begins to lead to more serious romance. Today's openness of youth about sex matters is very common. Lots of Christian teenagers today are falling into negative things because of ICOGESS 2019, March 14, Medan, Indonesia Copyright © 2020 EAI DOI 10.4108/eai.14-3-2019.2292024