Losing your job can be a punch to the gut.
Whether you saw it coming or got blindsided, being out of work can rob you of your identity. That can lead to a period of wallowing, self pity, and general unproductiveness.
It's OK to take a moment to be sad. If you got laid off from a position you enjoyed or even got fired from one you didn't, it can shake your world view. It's important however to not let self-pity take over and to get up off the canvas.
Source: Fool.com