Isaiah 49:4 - Ellicott's Commentary On The Whole Bible

Then I said. — The accents of disappointment sound strangely on coming from the lips of the true Servant; but the prophet had learnt by his own experience that this formed part of the discipline of every true servant of God, in proportion to the thoroughness of his service, and therefore it was not strange to him that the ideal Servant should also taste that bitterness. We find in the prophet of Anathoth a partial illustration of the law (Jeremiah 20:14). We find its highest fulfilment in the cries of Gethsemane and Golgotha, The sense of failure is surmounted only, as here, by looking to another judgment than man’s, and another reward (better than “work”). (Comp. 1 Corinthians 4:3.)