Unfortunately, the reverse is also true. If life fills a child's mosaic lens with mostly dark, ugly and painful memories, these remembered feelings darken and distort all his images of self, others and events. The world becomes an anxious, angry place filled with threats from within and from without. Failure is expected. Betrayal is expected.
Revenge is justified.
Lessons and silver linings do not exist to seek. This is not a perfect world. We cannot cushion children from all the pains and failures the future might hold. Nor should we try. Success has no meaning or joy if there is never failure.