The crucial point is that even "crazy" people operate in a particular culture, a particular society, a particular time and place, and within a certain world view of how to manage your rage, your hurt, and your sadness.

CNN: How a boy becomes a killer

That physical display of how you're feeling - for example, if you're feeling happy, the physical display of happiness on your face and, perhaps even in your gestures, increases the feeling of happiness, just as the physical display of sadness increases your feelings of sadness.

NPR: Can Botox Treat Depression Along with Wrinkles?

However, if your grief and sadness are affecting your care, causing you to isolate yourself from others, or prompting you to abuse alcohol or other drugs, you may want to consider talking to a social worker, psychologist or psychiatrist.

CNN: Spinal cord injury

Stand your ground and talk through the anger or sadness that is showing through your professional demeanor.

FORBES: Hillary Clinton Emotes On Capitol Hill

But we feel your pain, shock and sadness.

CNN: The week of terror flashbacks

Something about your question filled me with sadness.

CNN: What can cause depression in a 12-year-old?

That way, if your child develops certain warning signs, such as unusual sadness, irritability, anxiety, inattention, or a change in appetite, sleep, or ability to enjoy things, the doctor may be able to zero in on the cause -- and get your child help -- a lot sooner.

CNN: Six health problems your child may inherit from you

"We wouldn't be sincere, Your Holiness, if we didn't tell you that there's a veil of sadness on our hearts this evening, " Cardinal Tarcisio Bertone, Benedict's longtime deputy, told the pope at the end of the service, his voice breaking.

NPR: Pope Celebrates Last Public Mass As Pontiff

It's also full of sadness, anger, paranoia and visions of the apocalypse, which is also, knowing your past work, about what I expected.

NPR: Thom Yorke's 'Eraser' Prompts a Letter