Charles Spurgeon Commentary Isaiah 63:16

"For thou art our Father, though Abraham knoweth us not, and Israel doth not acknowledge us: thou, O Jehovah, art our Father; our Redeemer from everlasting is thy name." — Isaiah 63:16 (ASV)

Doubtless thou art our father, though Abraham be ignorant of us, and Israel acknowledge us not: thou, O LORD, art our father, our redeemer; thy name is from everlasting.

Get a hold of this great truth, believer. Say, "God is my Father. He is my Father still; and though he smite me, though he frown upon me, I will not quit my hold on him; I will still plead his dear Son's name, and wait for his mercy, trusting in his grace."