Hopeful promises are soul food.

We must eat to live. Faith eats and digests God’s promises and this produces hope.

So in Psalm 43, when the writer exhorts his soul to “hope in God,” he’s preaching to himself by saying, “Listen, soul! What are you afraid of? Have you forgotten the glorious future God has promised you? Do you believe your threatening circumstances are stronger than God? Get your eyes off your troubles and remember the Source of your hope! Eat, soul! Eat God’s promises!”

And this is what you and I must do as well. When our soul is in turmoil, God does not want us to be passive. We must pray, yes. But sometimes we need to stop praying. We need to stop listening to our soul recite its fears. Then is when it's time to preach to our soul. Fear is an indicator that our soul is hungry for hope. And the only foods that will really nourish and sustain the soul are God’s promises.

https://www.desiringgod.org/articles/if-you-feel-overwhelmed-eat