Charles Ellicott Commentary Isaiah 63:19

"We are become as they over whom thou never barest rule, as they that were not called by thy name." — Isaiah 63:19 (ASV)

We are Yours ... — Your, as the italics show, is not in the Hebrew, and its insertion distorts the meaning. Better, We have become as those over whom You have never ruled, upon whom Your name has never been called (Cheyne). What the prophet presents as a plea is not the contrast between Israel and the heathen, but the fact that Israel has been left to sink to the level of the heathen who had not known God. Would not that thought move Jehovah, as it were, to remember this covenant?