John Trapp on Isaiah 50:7

Ver. 7. For the Lord God will help me] And again, ver. 9. Behold the Lord God will help me. This lively hope held head above water. Hope we alſo perfectly (or, to the end) for the grace that is to be brought unto us at the revelation of Jeſus Chriſt, 1 Pet. 1.13.

Therefore ſhall I not be confounded] Heb. aſhamed, notwithſtanding the ſhame they ſeek to caſt upon me, ver. 6. I am as marble to which no dirt will ſtick.

Therefore I have ſet my face as a flint] Or, as ſteel (which is medulla ſive nucleus ferri, ſaith Pliny:) I have ſteeled my countenance, as Luke 9.51. See Ezek. 3.8, 9. So did Luther when he reſolved to appear at Wormes before the Emperour, though he were ſure to encounter as many devils there as were tiles upon the houſes.Act. & Mon. 776. See Acts 21.13.