"No one can serve two masters. He will either hate one and love the other, or be devoted to one and despise the other. You cannot serve God and mammon. "Therefore I tell you, do not worry about your life, what you will eat (or drink), or about your body, what you will wear. Is not life more than food and the body more than clothing?…
O you of little faith?… Your heavenly Father knows that you need them all. But seek first the kingdom (of God) and his righteousness, and all these things will be given you besides. Do not worry about tomorrow; tomorrow will take care of itself. Sufficient for a day is its own evil (Mt 6:24-34)
Look at the birds of the air and lilies of the fields, says Jesus. I am sure Jesus spent time in admiring and enjoying the feel of the birds and the natural things. He would have spent hours looking at them and that is why he is able to reflect on them. All these made him reflect on the goodness of the Father. His spirituality is so much earthly (reflecting on earthly things because they are creations of God and not running away from earthly things) and his teaching are from his own experience (not from ideas and principles).
Jesus seemed to have lived the present moment; he was not anxious about the next moment. He was celebrating the goodness of God here and now. He wanted his followers to do the same. He wanted them to make God their priority. Jesus is talking about God the creature. He is talking about a God who is invisibly present in his creatures.
When Jesus tells us not to worry about what to eat or drink or wear, he does not mean these things do not matter. Jesus himself liked a party as much as anyone else. He took his disciples with him whenever he was invited. What he says is that we should not put the world first. Rather, put God first and the world will come in. That is, we need to think about God’s kingdom and righteousness (covenant behaviour). These are signs of God’s people.