Water in a Jar of Dust

Sometimes I get bogged down due to lack of trust in my Heavenly Father whether it be about my students or my future or you name it. He knows when the sparrows fall and clothes the wild flowers, so I don't really know why I think any worrying I do can add or subtract to his plans. I wish my heart could soak that idea in and believe it. I really feel like the Lord is challenging me as of late. I know that he is calling me to sanity that is only found in himself but that doesn't mean at times my heart isn't profoundly disturbed. The spirit of peace is from God, but I think that as his spirit shifts our way of thinking it can be like pouring water in a jar of dust.