In this respect, indeed, the saying is true, One is the sower and another the reaper.

After Jesus’ resurrection and the pouring out of holy spirit on his disciples on Pentecost day of 33 C.E., these disciples would first do much reaping in this “sown” field. This they were “dispatched,” obligated, to do. The ones first “reaped” had been cultivated by the pure teaching of Jesus. Hence when they joined the spirit-begotten disciples they were as one man in maintaining pure teaching.