C. F. Keil and Franz Delitzsch on Isaiah 42:2

Isa 42:2

The prophet then proceeds to describe how the servant of Jehovah will manifest Himself in the world outside Israel by the promulgation of this right. “He will not cry, nor lift up, nor cause to be heard in the street, His voice.” “His voice” is the object of “lift up,” as well as “cause to be heard.” With our existing division of the verse, it must at least be supplied in thought. Although he is certain of His divine call, and brings to the nations the highest and best, His manner of appearing is nevertheless quiet, gentle, and humble; the very opposite of those lying teachers, who endeavoured to exalt themselves by noisy demonstrations. He does not seek His own, and therefore denies Himself; He brings what commends itself, and therefore requires no forced trumpeting.