John 12:29-30

The people therefore that stood by and heard it said that it thundered; others said, An angel spake to Him. V. 30. Jesus answered and said, This voice came not because of Me, but for your sakes.

The answer of the Father was both an assurance and a promise. But it was made principally for the sake of the people. They should under stand that it was God giving testimony of His Son, on account of the essential intimacy that obtained between them.

The ignorant Jews had heard the sound, but had not understood the words. And so they expressed their opinion, some thinking that there had been a clap of thunder, others, that an angel had spoken with Jesus.

The Lord therefore explains to them that the voice came for their sakes, in order that, if possible, they might accept Him as their Savior even now yet, in the eleventh hour, and thus be saved.