The meaning of sin is that it teaches humility; the Church says, felix culpa. ~Carl Jung; Conversations with C.G. Jung, Archetypes of the Shadow, Page 29.

Aging people should know that their lives are not mounting and unfolding but that an inexorable inner process forces the contraction of life. For a young person it is almost a sin — and certainly a danger — to be too much occupied with him; but for the aging person it is a duty and a necessity to give serious attention to him. ~Carl Jung; Modern Man in Search of a Soul Page 125,

I find that all my thoughts circle around God like the planets around the sun, and are as irresistibly attracted by Him. I would feel it to be the grossest sin if I were to oppose any resistance to this force. ~Carl Jung; Memories Dreams and Reflections, Page xi.

In old Egypt, for instance, there was no concept of sin in our sense at all. ~Carl Jung, ETH Lecture XIV, Page 247.

But who can be humble who has not sinned? This is why sin is so important; this is why it is said that God loves the sinner more than ninety-nine righteous men. ~Carl Jung, Jung-Ostrowski, Page 25.

As for the nigredo, it is certain that no one is redeemed from a sin he not committed, and that a man who stands on a peak cannot climb it. ~Carl Jung, Letters Vol. II, Pages 32-35.

Without error and sin there is no experience of grace, that is, no union of God and man. ~Carl Jung, Letters Vol. II, Pages 267-268.

It even looks as if there were a secret liaison between sin and grace and as if each sin had also the aspect of a felix culpa. ~Carl Jung, Letters Vol. II, Pages 471-473

It is the famous symbolism of the vessel, a symbolism that survives till 1925—see Parsifal. It is the Holy Grail, called the Vase of Sin (see King: The Gnostics and Their Remains). Also it is a symbol of the early Gnostics. ~Carl Jung, 1925 Seminar, Page 107

But God, who also does not hear our prayers, wants to become man, and for that purpose he has chosen, through the Holy Ghost, the creaturely man filled with darkness—the natural man who is tainted with original sin and who learnt the divine arts and sciences from the fallen angels. ~Carl Jung, CW 11, Para 746.

That is something I would definitely like to know, what sin really is, seeing that theology has been talking about it for thousands of years. ~Carl Jung, Letters Vol. I, Pages 253-254

Men would never have talked of sin and the forgiveness of sin had this not been a fundamental psychological fact that existed long before there were any laws. ~Carl Jung, Letters Vol. I, Pages 253-254

The sin to be repented, of course, is unconsciousness. ~Carl Jung, Aion, Pages 191-192.

S: “You do me wrong. Elijah is my father, and he knows the deepest mysteries. The walls of his house are made of precious stones. His wells hold healing water and his eyes see the things of the future. And what wouldn’t you give for a single look into the infinite unfolding of what is to come? Are these not worth a sin for you?” ~Salome to Carl Jung, Liber Novus, Page 246.

But no matter how much parents and grandparents may have sinned against the child, the man who is really adult will accept these sins as his own condition which has to be reckoned with. ~Carl Jung, Psychology and Alchemy, Page 117.

But who can be humble who has not sinned? This is why sin is so important; this is why it is said that God loves the sinner more than ninety-nine righteous men. ~Carl Jung, Jung-Ostrowski, Page 25.

With the feeling, however, that it would not be granted me to pierce through to his [Victor White] understanding. It was then that I sinned against my better insight, but at least it served as a pretext for my asking his forgiveness and offering him a touch of human feeling in the hope that this would afford him some small relief. ~Carl Jung, Letters Vol. II, Page 563