Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)
Ver. 4. My knowledge in the mystery] The highest point of heavenly learning; and hereby he proveth his calling to the ministry. The priest's lips should both preserve knowledge and present it to the people, to give them the knowledge of salvation by the remission of their sins, Malachi 2:7; Luke 1:77. An ass might not be coupled with an ox in ploughing. No ignorant doltish ass may plough in God's field, the Church; such as was that silly soul, who coming to be ordained, and being asked by the bishop, Esne dignus? answered, No, my lord, I shall dine anon with your men.