Mental pain is less dramatic than physical pain, but it is more common and also more hard to bear. The frequent attempt to conceal mental pain increases the burden: it is easier to say ‘My tooth is aching’ than to say ‘My heart is broken.’
We are all striving for perfection: the perfect man, the perfect friends, perfect emotional self-control--the perfect life. Perhaps so many people are unhappy because 'perfection' is not achievable, and they chase a goal that is always out of reach. That does not mean we each should not want to chase those things we define as "perfect", what will complete us. Maybe all we can be are perfect people "in progress", and maybe that will be enough and perfect in itself.