Life is sad and there is nothing we can do about it. All we can is to be vigilant about what we should not do. The worst thing we can do is to not feel the sadness, to not weep, to not acknowledge the hurt that sits at the core of the human heart.
I think that for humans, the most regrettable of omissions, along with unshed tears and unexamined lives, is untold stories, the things not shared, the lost opportunity to be honest about oneself and tender toward others.