R. Eleazar also said: Great is knowledge since it was placed between two Letters as it is written, For a God of knowledge is the Lord.
R. Eleazar also said: Great is the Sanctuary, since it was placed between two Letters, as it is written, Thou hast made for thee, O Lord, a Sanctuary: O Lord, thy hands have established it
R. Adda Karhina demurred: If so, then great is vengeance, since it was placed between two Letters, as it is written, O God of vengeance, O Lord: O God of vengeance, manifest thyself! — He replied: For its purposes it is so indeed. Even as 'Ulla said: Why these two manifestations? One as a measure of reward [for the righteous] and the other as a measure of punishment [for the wicked].

http://www.come-and-hear.com/sanhedrin/sanhedrin_92.html

The God of Talmud is vengeful.

I think the quote is great is vengeance
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Babylonian Talmud: Tractate Sanhedrin

Folio 92a
R. Adda Karhina demurred: If so, then great is vengeance, since it was placed between two Letters, as it is written, O God of vengeance, O Lord: O God of vengeance, manifest thyself

http://www.come-and-hear.com/sanhedrin/sanhedrin_92.html
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R Aha Karhina'ah demurred to this. According to this, he said, great is vengeance since it has been set between two names, as it says, God of vengeance, O Lord;20 He replied: That is so; that is to say, it is great in its proper sphere; and this accords with what ‘Ulla said: Why two vengeances here?21 One for good and one for ill. For good, as it is written, He shined forth from Mount Paran;22 for ill, as it is written, God of vengeance, O Lord, God of vengeance, shine forth.20
http://www.libroesoterico.com/biblioteca/Cristianismo Esoter...