The general consensus is that we gain wisdom and learn from our failures and mistakes; however, many do not accept the rationale of their errors and thus continually repeat them; therefore, when we do not acknowledge our missteps ignorance prevails.
The human mind has manipulated our species existence. We no longer know how to do the one thing that should be the most natural and simplest. We have forgotten how to just be.
Sometimes people begin, discover how much pain and fear they are holding, and adaptively decide to take whatever gains they have made and stop. Occasionally we reach the limits of our competence or capacity and must help one of people find someone or a nest of people who can hold their wounds when we can't. We could likely add other situations in which we have parted with someone early in the relationship or at a time that seemed premature. All of this is part of human limitation in both of us.