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The disciples can travel light because they trust God to supply their needs where they minister. Ancient Mediterranean peoples, especially Jewish people, emphasized hospitality (as in Cicero De Officiis 2.18.64; Ps-Phocyl. 24; Test. Job 10:1-4). Because strangers could abuse this system, however, Jewish people outside Palestine depended heavily on letters of recommendation showing that the traveler was of good reputation. Jesus' messengers had better backing than a letter of recommendation, however; the authority of Jesus himself stood behind them (10:40-42; compare 2 Cor 3:1-6).