People try to set their life in order according to some social system. However they do not even think that those by them chosen priorities lay somewhere deeper in a person. For this reason in our topic we could not avoid to make mention of the antique theories that had united people or during centuries had simply formed the different existential models of the person. The life of the divided person has lost its meaning. By giving too much preference to some things, one depreciate the other ones. This can lead even to a crime against the humanity. It is very important to know what foundation to lay while building our happiness of life. Every choise will be precautionary in a field of humanness, if not in that of a conscience. The dualistic life will never unite people in one family, unless the whole humanity sees its common existential end.