Sometimes, the reason you feel certain emotions is because you believe those emotions define you. But you are a child of God, and for example, sadness is only something you experience, it is not who you are. Often, the reason for this sadness is forgetting to rejoice in the Lord and becoming ungrateful for all His blessings.

Philippians 4:4 CSB
[4] Rejoice in the Lord always. I will say it again: Rejoice!