'It is I' in the Bible

for it is impossible that those,

that by two immutable things, in which it is impossible for God to fail, we might have strong consolation, who have fled for refuge to lay hold on the hope set before us;

For it is impossible that the blood of bulls and of goats should take away sins.

whereas without faith it is impossible to please Him; for he that cometh to God must believe, that He is, and is the rewarder of them that diligently seek Him.