" To live in the world, however, is always also co-living, a living with one another in the world, "and the world is our world, valid for consciousness as existing precisely through this 'living together." This shared world is "a universal mental acquisition, having developed as such and at the same time continuing to develop as the unity of a mental configuration, as a meaning construct." With this understanding of the manner of being a human life or "existence", a human life in the view of the existentialists is a matter of being-in-relation. Kierkegaard declared that a human being's existence is merely relation to others, and that what they are, they are by virtues of this relation.
The correlation of human beings and their world is a fundamental principle of existential phenomenology. Human life is not something, which human beings already possess in themselves, but something to be made together with others, through their actions in and about their world. The world affords various possible kinds of human life and determines the limits within which a particular human life can be realized. Human beings give meaning their world in and through their actions. But before human beings have to do with the world of things, they have to do with other human beings and they see those things through their relations with those others. To the giveness of the world of things belongs the sense of it as something for others and shaped by others as well as oneself. Through their relations with other human beings, it is interrelationship between one and another, human beings makes our existence meaningful and valuable.
A bond of love, embracing all in relation with others, knits human beings together through the complicated dimensions of life: family, dialogue, working in a society, etc. Firstly, a person is a human being, a creature, who has the capability and obligation of inquiring into and investigating the profound meaning of "being".