And he called unto him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;
And commanded them that they should take nothing for their journey,
save a staff only; no scrip, no bread, no money in their purse: But be shod with sandals; and not put on two coats. And he said unto them, In what place soever ye enter into an house, there abide till ye depart from that place.
And whosoever shall not receive you, nor hear you, when ye depart
thence, shake off the dust under your feet for a testimony against them.
Verily I say unto you, It shall be more tolerable for Sodom and
Gomorrha in the day of judgment, than for that city. And they went out, and preached that men should repent. And they cast out many devils, and anointed with oil many that were sick, and healed them.
St. John Chrysostom's Homily 32 on Matthew 9 says:
"He was answering many good purposes: first setting His disciples above suspicion; secondly, freeing them from all care, so that they might give all their leisure to the world; thirdly, teaching them His own power. Of this He pointedly speaks out to them afterwards, 'Did you lack anything when I sent you naked and unshod?' …It was his intention to train them up to all perfection, as we saw even earlier when He had not suffered them to take thought so much as for the next day. For He planned to send them out as teachers to the whole world. To this purpose He makes angels of men, releasing them from all worldly care, so that they should be possessed with only one care: that of teaching. In face, He releases them even from that, saying, 'Take no thought how or what you will speak' …He not only requires them to seek out worthy persons, but also not to change house for house. This way they would neither vex him who is receiving them, no themselves get the character of gluttony and self-indulgence…These things are said not of the apostles alone, but also later of the saints. Let us therefore become worthy to entertain them…for nothing so much characterizes strictness of life as to be free from superfluousness."
St. Isaac says:
"Without freedom from cares do not expect to find light in your soul, nor peace and silence with your senses at large." (Ch.69, I)
St. John of the Ladder says:
"A small hair worries the eye and a small care destroys silence, for silence means laying aside of all thoughts not bearing on the work of salvation, and renunciation of all cares, even for matters of good report. Nor will a man who has attained true silence worry about his body for He Who promised to care for it is not false." (Ch. 27, 51,52)