When you're staying — you're existing.
When you're doing something — you're existing and living.
When you're not doing something and laying (in a box 6 feet under, you know) — you doesn't exist.
You can exist and live. You can exist but do not live. But you can not live and do not exist.
When you're in same place for ever — you're not moving. You're not doing anything. You exist.
When you're moving — you are living. You're doing something.
When you're busy — you are not sad or in a bad [looser] mood. You are busy.
When you're not busy — bored — you are sad or/and in a bad [looser] mood.