Volume 1 & 2
Five stars do not mean my agreement with Tillich, but that this is a monumental theological work: rigorous, thoughtful, and honest. The book promoted his programme for systematic theology - a theology of correlation between questions (of human existence) and (Divine) answers. Correlation specifically does not mean causation: questions do not cause answers but rather relate to them. He wanted (and built) the theology on the language adequate in the present circumstances.
He defended the orthodoxy in Christology and other main domains, at the same time opposed any fundamentalism in theology, any intention to find a solution in good old time. He insisted that theology should have adequate answers to the challenges of the time, which could not be borrowed from the past and must be developed from Revelation in each particular epoch. His work is the attempt to offer such theology for contemporaries.
He stressed the need for an adequate language of the theology and criticised the vocabulary of Greek philosophy as inadequate for Christian dogmatics, and for describing Christ in particular. This point is more or less apparent, but his pretension to mend it with using the language of modern philosophy is not. Of course, it suits well for the description of poverty and wretchedness of human existence, but, when it comes to Christology, his word could well interpret as Arianism, which he consistently denied all the book, as well as many other heresies due to the lack of clarity.
My edition includes commentary of the very orthodox kind the commentator is more willing to denounce Tillich's idea at any point that they deviate from the teaching of Orthodox Church than to explain his position. It adds breadth to the reading but not depth.