We need spiritual food just as much as physical food. Jehovah can lift your spirits when you're in a bad mood. Just ask him to give you faith and to fill you with the Holy Spirit. Jehovah is listening, if you pray to him about it, he will hear it. You can receive spiritual food if it's something that you seek. I receive it by praying and going to church twice a week. So remember this when you're angry, worried or depressed. Turning to Jehovah is the way for you to receive true happiness.