This passage from Matthew 6:25-34 discusses not worrying and having faith in God's provision. It makes three key points:
1. Worrying is pointless and will not change anything or add more time to your life. Look at how nature is provided for without worrying.
2. Worrying shows a lack of trust and faith in God who cares for you and knows your needs. He will clothe you as he does the grass in the fields.
3. Do not focus on basic provisions but instead seek God's kingdom and righteousness and allow him to provide your daily needs as you live one day at a time. Do not worry about tomorrow.