Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own. - Matthew 6:34 - NIV
I think the point of this passage is that God knows us, He knows what we need.
We need to not worry (easier said than done) and not feel anxious (easier said than done) and trust that God will take case of us. Our tomorrow is not just ours alone.
Getting rid of worry is definitely not easy. Some would argue that repentance is necessary and then then realigning our heart with God’s promise to meet our needs.
Worry is a touch emotion. No matter how close I feel to God, I still tend to worry even though I know in my heart and soul that God will provide and that God is steering me in the right direction.
Translation: Emotions are tricky!!!