Thinking protects against the way of error, and therefore it leads to petrification. Carl Jung and Elijah, Liber Novus, Page 248.

There, that’s the error, one must not seek happiness. The happiness that one seeks is a usurped one. Knowledge rests not upon truth alone, but upon error also. Carl Jung; Modern Man in Search of a Soul If you avoid error you do not live. Carl Jung, Jung, C.G. Jung Speaking, p. 98.
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.

One should be willing to make mistakes cheerfully.

The most perfect analysis cannot prevent error. Carl Jung, 1925 Seminar, Page 13