18:19 The Christian church was at this time entering upon an important era. The work of proclaiming the gospel message among the Gentiles was now to be prosecuted with vigor; and as a result the church was to be strengthened by a great ingathering of souls. The apostles who had been appointed to lead out in this work would be exposed to suspicion, prejudice, and jealousy. Their teachings concerning the breaking down of "the middle wall of partition" (Ephesians 2:14) that had so long separated the Jewish and the Gentile world, would naturally subject them to the charge of heresy, and their authority as ministers of the gospel would be questioned by many zealous, believing Jews. God foresaw the difficulties that His servants would be called to meet, and, in order that their work should be above challenge, He instructed the church by revelation to set them apart publicly to the work of the ministry. Their ordination was a public recognition of their divine appointment to bear to the Gentiles the glad tidings of the gospel.