Crying, that is, sobbing is the earliest and deepest way to release tension. Infants can cry almost from the moment of birth, and do so easily following every stress that produces a state of tension in the body... Human beings are the only creatures who can react in this way to stress and tension. Most probably, they are the only ones who need this form of release.

Alexander Lowen
Another Quote

The Power Of Failure: We Get To Decide What It Means