I always worked with the temperamental conviction that fundamentally there are no insoluble problems, and experience justified me in so far as I have often seen individuals simply outgrow a problem which had destroyed others. ~Carl Jung, The Secret of the Golden Flower, Page 88.

I had learned in the meanwhile that the greatest and most important problems of life are all in a certain sense insoluble. They must be so because they express the necessary polarity inherent in every self-regulating system. They can never be solved, but only outgrown. ~Carl Jung, The Secret of the Golden Flower, Page 89.

I am glad you have taken up The Secret of the Golden Flower again. The East often knows the answer to questions which appear insoluble to us Christians. ~Carl Jung, Letters Vol. II, Pages 391-392.

The paradoxical nature of God has a like effect on man: it tears him asunder into opposites and delivers him over to a seemingly insoluble conflict. ~Carl Jung, CW 11, Para 738