How Should Christians Handle Disappointments?

We all experience times in life when we feel down for various reasons. but we can't allow our circumstances to control our emotions. Satan seeks to fill our minds with negative thoughts that eventually cause us to lose our joy and feel negative. He is a discourager, and he wants to pull us down emotionally, spiritually, financially in every way he can. But Jesus is our Encourager and wants to lift us up! He came to give us righteousness, peace, joy and hope.