John Chrysostom — as excerpted in the Catena Aurea on Matthew 10:9-10

“A happy exchange! In place of gold and silver, and the like, they received power to heal the sick, to raise the dead. For He had not commanded them from the beginning, Possess neither gold nor silver; but only then when He said at the same time, Cleanse the lepers, cast out dæmons. Whence it is clear that He made them Angels more than men, freeing them from all anxiety of this life, that they might have but one care, that of teaching; and even of that He in a manner takes away the burden, saying, Be not careful what ye shall speak. Thus what seemed hard and burdensome, He shews them to be light and easy. For nothing is so pleasant as to be delivered from all care and anxiety, more especially when it is possible, being delivered from this, to lack nothing, God being present, and being to us instead of all things.”