The paradox of the Christian message is in one personal life essential manhood has appeared under the conditions of existence without being conquered by them.The profundity of this quote is probably not apparent unless one has read the rest of the system, but here we have the heart of Tillich's theological project. He once said that his dream was that people one day could talk about religion without embarrassment. To reach this end he went about creating a new religious language, without the negative baggage of history.
Systematic Theology II, 94.
Anyway, one could say that the above sentence is the goal of this project, because here Tillich in one sentence formulates the Christian message. The whole preceding discussion, where he analyses the existence and the essence of being human serves to create the possibility to profess this claim, that in Christ, sin, suffering, meaninglessness and evil is overcome, and this in a life that is lived out in exactly the conditions we live in.