John Trapp on Mark 1:2

Verse 2. As it is written in the Prophets] Esay and Malachi: so that there was no cause why that dead Dog Porphyry should here bark and blaspheme, as if this testimony should be falsely fathered on all the Prophets, when Esay only was the Author of it. Behold I send my Messenger before thy face] Malachi saith, Before my face, in the person of Christ: to show that He and the Father are One.