Why is the "servant of God" so gentle, while God seems almost violent?

The lesson touches Chapters 41-49, but we focus mostly on Isaiah 42. As well as the recurring eyes/ears theme, we notice patterns of flame (flickering candles and consuming fires) and of lands across the sea and islands. God's servant is astonishingly gentle, and this almost contrasts with God Himself. There's a remarkable blending of birthing mother and strongman warrior imagery.