This must have been how Jesus handled the human emotion of feeling overwhelmed. Because while feeling overwhelmed isn't a sin, anxiety is a sin - so Jesus, the sinless one, successfully resisted the temptation to worry. He must have trained himself to constantly circle back to the circumstances of today and live those out well, while continually giving over thoughts and question about the intricacies of the future to God the Father.
This may be one of the toughest disciplines we face in the modern age. Our lives are full to the point of overflow, and it can feel like a constant juggling act to keep up. Daily we must resist two temptations: first, to take on more than God intends for us, and second, to take the reigns and the weight of tomorrow into our own hands.
Feeling overwhelmed is a beacon that signals the nearness of anxiety. As we begin to see this, we can consciously decide to run to God and unburden ourselves to him rather than sin by taking it on ourselves in the form of worry. And as we live in today and acknowledge his sovereignty in tomorrow, we can begin to feel God's freedom and peace replacing the sense of being overwhelmed.