“If we believe not, yet he abideth faithful: he cannot deny himself.”
King James Version (KJV)
2:13 If we believe not - That is, though some believe not, God will make good all his promises to them that do believe. He cannot deny himself - His word cannot fail.
2Ti 2:13 If we believe not, [yet] he abideth faithful. If we prove faithless, he will still be faithful to keep every promise he has made.