
Hilary of Poitiers
Catena Aurea · Matthäusevangelium 6
Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof.
This is further comprehended under the full meaning of the Divine words. We are commanded not to be careful about the future, because sufficient for our life is the evil of the days wherein we live, that is to say, the sins, that all our thought and pains be occupied in cleansing this away. And if our care be slack, yet will the future be careful for itself, in that there is held out to us a harvest of eternal love to be provided by God.