Jamieson, Fausset and Brown on Isaiah 41:25

25. raised up--in purpose: not fulfilled till a hundred fifty years afterwards.

north--In Is 41:2, "from the East"; both are true: see the note there.

call ... my name--acknowledge Me as God, and attribute his success to Me; this he did in the proclamation (Ezr 1:2). This does not necessarily imply that Cyrus renounced idolatry, but hearing of Isaiah's prophecy given a hundred fifty years before, so fully realized in his own acts, he recognized God as the true God, but retained his idol (so Naaman, 2Ki 5:1-27; compare 2Ki 17:33, 41; Da 3:28; 4:1-3, 34-37).

princes--the Babylonian satraps or governors of provinces.

mortar--"mire"; He shall tread them under foot as dirt (Is 10:6).