Before they call... — In man’s experience of men, often, as things are now, in his relations with God, there is an interval between prayer and the answer. In the new Jerusalem the two would be simultaneous, or the answer would anticipate the prayer.
Related Commentaries of Isaiah 65:24
Isaiah 65:24
24 And it shall come to pass, that before they call, I will answer; and while they are yet speaking, I will hear.