Commentaries:
God is speaking to Israel, but in spirit, He is also speaking to the church, though it is not His primary objective. The primary objective is Israel, and it is a time yet future. This has not yet been fulfilled.
John W. Ritenbaugh
New Covenant Priesthood (Part One)
Other Forerunner Commentary entries containing Isaiah 43:15:
John 10:4
John 10:14
John 10:16